High-Calorie Protein Bars for Endurance, Expeditions, Low Appetite and Weight Gain Big calories. Small bar.
Up to 557 calories in a compact, lightweight bar of only 120g, with up to 66g of carbs and 19g of protein. Eat it on the go, or stir it into hot water for an easy porridge.
Made in small batches in the UKShips to 21 countries
“I love Phoenix Bars. They're really tasty, packed with calories, and super easy to consume. I would 100% recommend.”
Phoenix Bars
Up to 557 calories in a compact, lightweight bar of only 120g, with up to 66g of carbs and 19g of protein. Six flavours.
- Up to 557 calories
- Only 120g
- Up to 66g carbs
- Up to 19g protein
- A meal's worth of calories in a small, lightweight bar
- Eat it as a bar, or stir into hot water for porridge
- Easy to eat and easy to digest, even when your appetite is low
- Not sickly sweet, so you can keep eating them
- Won't freeze or melt. Up to 2-year shelf life
Six flavours in every bundle
Vanilla
Chocolate
Salted Caramel
Ginger
Apple & Cinnamon
Cherry Bakewell
Vanilla
Chocolate
Salted Caramel
Ginger
Apple & Cinnamon
Cherry BakewellBundles
Most customers order 12 bars for endurance and expeditions, 18 for weight gain and 36 for long expeditions.
Starter Bundle, 12 bars: two of each flavour, 6,462 calories
Or build your own bundle £5.25 a bar
Vanilla552 calories66g carbs18g protein
Chocolate533 calories62g carbs19g protein
Salted Caramel529 calories64g carbs18g protein
Ginger531 calories65g carbs18g protein
Apple & Cinnamon529 calories66g carbs18g protein
Cherry Bakewell557 calories60g carbs18g protein
Every bite packs more calories.
Up to 557 calories, 66g carbs and 19g protein
All in one compact bar of only 120g, with carbs, fats and plant protein together. That's about 4.6 calories per gram, more than typical energy bars, protein bars or gels, so you get more from less food, whether you're fuelling a long day or trying to gain weight.
Easy to get down
Low volume, soft and not too sweet, so it's a smaller ask when you don't feel like eating, and you can make it into porridge.
Soft, melts in your mouth
It's a pressed oat flapjack, so it's easy to bite and chew, and it stays soft at minus 45. It won't melt in desert heat either.
Not sickly sweet
Sweet gels and bars get hard to face after a few hours, so all six flavours are deliberately mild.
Real places our customers have taken Phoenix Bars. Not affiliated with or endorsed by any event or organiser.
20,000+
bars sold.
Sent to 21 countries, from the South Pole to kitchen tables at home. Here are a few of the places they ended up.
Shop the bars
When to eat our high-calorie bars
Up to 557 calories in only 120g, and it won't freeze at minus 45 or melt in the Sahara. Easy to count and easy to pack.
Expedition food guideWhen a full plate feels like too much, a few bites of a soft bar can be an easier start. Crumble it into warm milk or stir it into hot water for porridge if chewing is hard.
What to eat when appetite is lowEat a few bites every hour or so. Soft and not too sweet, so it makes a change from another gel when your stomach is tired.
Ultra running fuel guideAn easy way of getting more calories in between meals, without needing a bigger plate. Have one as a snack, or as porridge for breakfast.
High calorie bars for weight gain
Need more calories?Compared with a typical energy bar, protein bar and energy gel
| What you get | Phoenix Bar | Energy bar | Protein bar | Energy gel |
|---|---|---|---|---|
| Calories in one | Up to 557 | About 250 | About 200 | About 100 |
| How many to match one Phoenix Bar | Just 1 | 2 to 3 | About 3 | 5 to 6 |
| Calories per gram | 4.6 | 3.8 | 3.5 | 1.4 |
| Carbs and protein together | Up to 66g and 19g | Mostly carbs | Mostly protein | Carbs only |
| Eat it as a bar or make it into porridge | No | No | No | |
| Stays soft in the cold, won't melt in the heat | Some | Some | Some | |
| Vegan and gluten-free, every flavour | Some | Some | Some |
Phoenix figures are from our labels. The other columns are typical values for popular UK products, so individual products will vary.
What's inside a Phoenix Bar
Gluten-free rolled oats
The base of every bar, between 26% and 32% of the recipe, and the reason it eats like a flapjack.
Soy and pea protein
Soy protein isolate and pea protein crisps give up to 19g of plant protein per bar.
Coconut oil
Fat carries more than twice the calories of carbs or protein, gram for gram. It's how up to 557 calories fit into only 120g.
Real flavour
Dark chocolate drops, dried apple and cinnamon, ground ginger, and almonds in the Cherry Bakewell. No artificial sweeteners or colours.
Nutrition and ingredients, every flavour
Tap a flavour to see its nutrition label, ingredients and allergens.
Vanilla (Original)
| Nutrient | Per 100g | Per bar (120g) |
|---|---|---|
| Energy | 1925 kJ 460 kcal | 2310 kJ 552 kcal |
| Fat | 19g | 23g |
| of which saturates | 9.2g | 11g |
| Carbohydrate | 55g | 66g |
| of which sugars | 24g | 29g |
| Fibre | 3.8g | 4.6g |
| Protein | 15g | 18g |
| Salt | 0.34g | 0.41g |
Typical values. Full vitamin and mineral breakdown on request.
Ingredients: Vanilla (Original)
GF Rolled Oats (32%), Glucose Syrup (SULPHITES), Sugar, Coconut Oil, SOY Protein Isolate (7%), Pea Protein Crisps (6%) [Pea protein, Rice flour], Rapeseed Oil, GF Oat Flour, Glycerine, Plain Caramel [Glucose syrup, Water, Sugar], Natural Flavouring (1.3%), Antioxidant: Mixed Tocopherols (Vitamin E).
Allergens are in bold. Made in an environment that handles egg, gluten, milk, nuts, peanuts, sesame, soy and sulphites. May contain nuts, eggs, sesame, peanuts and milk.
Storage and shelf life
Up to a 2-year best-before date. Store somewhere cool and dry. The bar holds its texture in freezing and hot conditions, so it's fine in a pack, drop bag or kit box.
How to eat it
Eat it whole, break it into chunks for long days, or crumble it into hot water or milk for a quick porridge.
Cherry Bakewell
| Nutrient | Per 100g | Per bar (120g) |
|---|---|---|
| Energy | 1942 kJ 464 kcal | 2330 kJ 557 kcal |
| Fat | 21g | 24.8g |
| of which saturates | 10g | 12.5g |
| Carbohydrate | 50g | 60g |
| of which sugars | 16g | 19.5g |
| Fibre | 3.7g | 4.4g |
| Protein | 15g | 18g |
| Salt | 0.15g | 0.18g |
Typical values. Full vitamin and mineral breakdown on request.
Ingredients: Cherry Bakewell
Gluten Free Rolled Oats, Glucose Syrup, Sugar, Coconut Oil, SOY Protein Isolate, Pea Protein Crisps [Pea protein, Rice flour], Rapeseed Oil, ALMONDS, Glycerine, Plain Caramel [Glucose syrup, Water, Sugar], Cherry Flavouring (1%), Natural Flavouring (0.5%), Antioxidant: Tocopherols.
Allergens are in bold. Made in an environment that handles egg, gluten, milk, nuts, peanuts, sesame, soy and sulphites. May contain nuts, eggs, sesame, peanuts and milk.
Storage and shelf life
Up to a 2-year best-before date. Store somewhere cool and dry. The bar holds its texture in freezing and hot conditions, so it's fine in a pack, drop bag or kit box.
How to eat it
Eat it whole, break it into chunks for long days, or crumble it into hot water or milk for a quick porridge.
Chocolate
| Nutrient | Per 100g | Per bar (120g) |
|---|---|---|
| Energy | 1858 kJ 444 kcal | 2230 kJ 533 kcal |
| Fat | 19g | 22.3g |
| of which saturates | 11g | 12.7g |
| Carbohydrate | 52g | 62g |
| of which sugars | 16g | 19.4g |
| Fibre | 5.2g | 6.2g |
| Protein | 16g | 19g |
| Salt | 0.14g | 0.17g |
Typical values. Full vitamin and mineral breakdown on request.
Ingredients: Chocolate
GF Rolled Oats (26%), Glucose Syrup, Sugar, Coconut Oil, SOY Protein Isolate (7%), Pea Protein Crisps (6%) [Pea protein, Rice flour], Rapeseed Oil, GF Oat Flour, Dark Chocolate Drops (5%) [cocoa mass, sugar, cocoa butter, fat-reduced cocoa powder, emulsifier: SOYA lecithin], Glycerine, Cocoa Powder (3.7%) [Acidity regulator: Potassium Carbonate], Natural Flavouring, Antioxidant: Mixed Tocopherols (Vitamin E).
Allergens are in bold. Made in an environment that handles egg, gluten, milk, nuts, peanuts, sesame, soy and sulphites. May contain nuts, eggs, sesame, peanuts and milk.
Storage and shelf life
Up to a 2-year best-before date. Store somewhere cool and dry. The bar holds its texture in freezing and hot conditions, so it's fine in a pack, drop bag or kit box.
How to eat it
Eat it whole, break it into chunks for long days, or crumble it into hot water or milk for a quick porridge.
Salted Caramel
| Nutrient | Per 100g | Per bar (120g) |
|---|---|---|
| Energy | 1844 kJ 441 kcal | 2213 kJ 529 kcal |
| Fat | 18g | 21.7g |
| of which saturates | 10g | 12.3g |
| Carbohydrate | 53g | 64g |
| of which sugars | 16g | 19.4g |
| Fibre | 3.8g | 4.6g |
| Protein | 15g | 18g |
| Salt | 0.54g | 0.65g |
Typical values. Full vitamin and mineral breakdown on request.
Ingredients: Salted Caramel
GF Rolled Oats, Glucose Syrup, Sugar, Coconut Oil, SOY Protein Isolate, Pea Protein Crisps [Pea protein, Rice flour], Rapeseed Oil, GF Oat Flour, Glycerine, Plain Caramel [Glucose syrup, Water, Sugar], Natural Flavouring (0.5%), Sea Salt (0.4%), Antioxidant: Tocopherols.
Allergens are in bold. Made in an environment that handles egg, gluten, milk, nuts, peanuts, sesame, soy and sulphites. May contain nuts, eggs, sesame, peanuts and milk.
Storage and shelf life
Up to a 2-year best-before date. Store somewhere cool and dry. The bar holds its texture in freezing and hot conditions, so it's fine in a pack, drop bag or kit box.
How to eat it
Eat it whole, break it into chunks for long days, or crumble it into hot water or milk for a quick porridge.
Apple & Cinnamon
| Nutrient | Per 100g | Per bar (120g) |
|---|---|---|
| Energy | 1844 kJ 441 kcal | 2213 kJ 529 kcal |
| Fat | 17g | 20.9g |
| of which saturates | 9.9g | 11.9g |
| Carbohydrate | 55g | 66g |
| of which sugars | 19g | 22.4g |
| Fibre | 4.6g | 5.5g |
| Protein | 15g | 18g |
| Salt | 0.15g | 0.18g |
Typical values. Full vitamin and mineral breakdown on request.
Ingredients: Apple & Cinnamon
GF Rolled Oats (26%), Glucose Syrup, Sugar, Coconut Oil, SOY Protein Isolate (7%), Pea Protein Crisps (6%) [Pea protein, Rice flour], Rapeseed Oil, GF Oat Flour, Glycerine, Dried Apple Pieces (4%) [Naturally occurring SULPHITES present], Plain Caramel [Glucose syrup, Water, Sugar], Cinnamon (0.6%), Antioxidant: Mixed Tocopherols (Vitamin E).
Allergens are in bold. Made in an environment that handles egg, gluten, milk, nuts, peanuts, sesame, soy and sulphites. May contain nuts, eggs, sesame, peanuts and milk.
Storage and shelf life
Up to a 2-year best-before date. Store somewhere cool and dry. The bar holds its texture in freezing and hot conditions, so it's fine in a pack, drop bag or kit box.
How to eat it
Eat it whole, break it into chunks for long days, or crumble it into hot water or milk for a quick porridge.
Ginger
| Nutrient | Per 100g | Per bar (120g) |
|---|---|---|
| Energy | 1851 kJ 443 kcal | 2222 kJ 531 kcal |
| Fat | 18g | 21.4g |
| of which saturates | 10g | 12.1g |
| Carbohydrate | 54g | 65g |
| of which sugars | 16g | 19.1g |
| Fibre | 3.9g | 4.7g |
| Protein | 15g | 18g |
| Salt | 0.15g | 0.18g |
Typical values. Full vitamin and mineral breakdown on request.
Ingredients: Ginger
GF Rolled Oats, Glucose Syrup, GF Oat Flour, Sugar, Coconut Oil, SOY Protein Isolate, Pea Protein Crisps [Pea protein, Rice flour], Rapeseed Oil, Glycerine, Plain Caramel [Glucose syrup, Water, Sugar], Vanilla Flavouring (1%) [Water, propylene glycol, caramel sugar syrup, thickener: xanthan gum; acidity regulator: citric acid; preservative: potassium sorbate], Ground Ginger (1%), Antioxidant: Tocopherols.
Allergens are in bold. Made in an environment that handles egg, gluten, milk, nuts, peanuts, sesame, soy and sulphites. May contain nuts, eggs, sesame, peanuts and milk.
Storage and shelf life
Up to a 2-year best-before date. Store somewhere cool and dry. The bar holds its texture in freezing and hot conditions, so it's fine in a pack, drop bag or kit box.
How to eat it
Eat it whole, break it into chunks for long days, or crumble it into hot water or milk for a quick porridge.
Built from 150 conversations
I'm James. I built a high-calorie bar after 150 conversations with ultra runners, expedition teams and people who find eating hard. Every bar still goes through my hands before it reaches yours.
I asked 150 people
Ultra runners, expedition leaders and people who find eating hard told me what their food got wrong.
Three years on the recipe
About 18 months of that went into keeping it soft at minus 45 without it melting in the heat.
Sharing what I learned
Including a talk at a Marathon des Sables event. More than 50 MDS runners have used Phoenix Bars.
I still pack every order
Every box is packed by hand before it goes out.
Phoenix Bars reviews: rated 4.9 out of 5 from 398 reviews
★★★★★Flaming Phoenix Bars featured as a star in my food supply for my recent South Pole expedition! Easy to eat, even at -45c.
★★★★★Phoenix Bars are helping me to weight gain prior to Everest next year, which is a big problem for me.
★★★★★They don’t freeze easily, provide the sustained energy I need, and help prevent weight loss during intense climbs.
★★★★★I normally struggle to eat solids during races but I found Phoenix Bars so easy to get down on the move and to digest.
★★★★★Provided great energy on the Legendary MdS - 270 km across the Sahara
★★★★★Phoenix Bars saved the day when I was struggling with high-altitude appetite issues
High-calorie protein bars, made in the UK
Phoenix Bars are high-calorie protein bars for days when you need more calories than normal food can easily give you. Each compact bar of only 120g has up to 557 calories, up to 66g of carbohydrate and up to 19g of plant protein, so it works as a compact meal bar on a long run, an expedition ration, or an easy snack between meals.
Many customers use them as high calorie bars for weight gain, when they want to put weight back on or hold it steady. Others keep them as high calorie protein snacks for days when their appetite is low, or as calorie-dense fuel for ultra marathons, climbs and ocean rows. The bars are made in small batches in the UK, and every flavour is also vegan, gluten-free and palm oil free.
If you have been comparing weight gain bars, protein bars for weight gain or other calorie bars, the big difference is size. Most top out at around 200 to 250 calories. A Phoenix Bar gives you up to 557, with carbs, fats and protein together, in one soft, compact bar you can eat a few bites at a time or turn into an easy porridge.
Still comparing? See our guides to the best meal replacement bars in the UK, the best energy bars for weight gain, the highest-calorie bars in the UK and our list of high-calorie snacks.
Phoenix Bars questions, answered
What are Phoenix Bars?
Phoenix Bars are high-calorie nutrition bars designed to provide a compact, calorie-dense food option for extreme endurance activities, expeditions, and situations where maintaining adequate calorie intake can be difficult.
How many calories are in a Phoenix Bar?
Each Phoenix Bar delivers up to 557 calories per bar, making it significantly more calorie-dense than standard energy bars or snacks.
Who are Phoenix Bars designed for?
Phoenix Bars are designed for ultra-endurance athletes, expedition teams, mountaineers and individuals seeking a high-calorie food option during periods of reduced appetite or unintended weight loss.
Are Phoenix Bars suitable for people with reduced appetite?
Phoenix Bars can be suitable for individuals looking to increase calorie intake when appetite is reduced, as they pack a lot of calories into a small, soft, and easy-to-eat format. Our guide on high-calorie food when eating is difficult explains why calorie density matters when appetite is limited.
Are Phoenix Bars good for weight gain?
Each Phoenix Bar adds up to 557 calories in a small, soft, easy-to-eat format, which is why many customers use them as high calorie bars for weight gain when full meals are difficult or appetite is low. One bar between meals adds a meaningful share of a day's calorie target without filling you up before your next meal.
Are Phoenix Bars flapjacks?
Yes. Phoenix Bars are oat-based, high calorie flapjacks. The difference from a standard shop flapjack is the engineering: a single, compact 120g bar carrying up to 557 calories, roughly twice the calories of a typical 65g flapjack, with up to 19g of protein and a recipe that will not freeze or melt.
How much protein is in a Phoenix Bar?
Up to 19g per bar, from soya and pea protein, alongside up to 66g of carbohydrate. Phoenix Bars are built calorie-first for total calorie intake, so they carry more protein than a standard energy bar but are not a low-calorie protein bar.
Can I order Phoenix Bars in the Netherlands, France, or elsewhere in Europe?
Yes. Phoenix Bars ship across Europe, including the Netherlands, France, Belgium and Germany, and to Canada, Australia, New Zealand, Singapore and Hong Kong. EU orders arrive in 4-10 business days with all taxes and duties collected at checkout: we're IOSS-registered, so your parcel clears customs with nothing to pay on delivery and no courier handling fees. The total you see at checkout is the final price. Orders to Canada, Australia, New Zealand, Singapore and Hong Kong take 5-15 business days; any local import charges, where they apply, are payable on delivery under your country's rules. We do not ship to the USA yet. If you are in the US, email me at jfrost@flaming-phoenix.co.uk and I will tell you the moment it opens.
Plan your fuelling
Practical, free guides for races, expeditions and getting more calories in.
Ultra endurance
Expeditions and hiking
Fuel your next big effort
Most customers start with the Starter Bundle: 12 bars, two of every flavour, so you find your favourite. Gaining weight? Most choose the 18-bar Essential Bundle.
Get the Starter Bundle