Best Chocolate Protein Powder UK 2026: Taste and Price Checked
The best chocolate protein powders in the UK, ranked by taste and by cost per 25g of protein, with each chocolate flavour's own protein per 100g checked on the brand's website in September 2026.
Kevin, founder of WheyWise
Quick answer
The best chocolate protein powder for most people is Optimum Nutrition Gold Standard 100% Whey in Double Rich Chocolate. I drink it with water and it mixes very well, tastes of real chocolate and does not go too thick. It costs £1.23 per 25g of protein in the 4.53kg tub at £170 on optimumnutrition.com, checked 23 September 2026. WheyWise checked every price and every chocolate flavour's own nutrition label in this guide on the brand's website.
Chocolate is the flavour most people pick first, and the one that hides the taste of whey best. But chocolate flavours are not all equal: cocoa takes up room in the scoop, so a chocolate flavour can carry less protein than the vanilla version of the same powder, and that changes the real price. This guide ranks the chocolate protein powders we checked by cost per 25g of protein, using each chocolate flavour's own nutrition label. Every price was read on the brand's own website on 23 September 2026, one-off price with no code. More about me and how WheyWise works.
What is the best chocolate protein powder in the UK?
Optimum Nutrition Gold Standard 100% Whey in Double Rich Chocolate is the chocolate protein powder I would recommend to almost everyone. I always mix my shakes with water, and this one mixes very well, tastes of real chocolate and is not too thick. Optimum Nutrition Gold Standard 100% Whey Double Rich Chocolate costs £1.23 per 25g of protein in the 4.53kg tub at £170, or £1.43 in the 2.26kg tub at £98, on optimumnutrition.com, checked 23 September 2026. Neither was a sale price.
Optimum Nutrition Gold Standard 100% Whey Double Rich Chocolate contains 76g of protein per 100g, which is 24g of protein in each 31g scoop, with 116 kcal and 1.0g of sugar per scoop. Its protein is a blend of whey isolate, whey concentrate and hydrolysed whey isolate, and the chocolate comes from fat reduced cocoa powder, sweetened with sucralose and acesulfame K. It is not the cheapest chocolate whey, but it is the one I trust to taste right every time. For how it compares with every flavour I have tried, not just chocolate, read my best tasting protein powder UK guide.
Best chocolate whey
Optimum Nutrition Gold Standard 100% Whey Protein
900g bag
The chocolate whey I recommend to almost everyone: real chocolate taste with water, from £1.23 per 25g of protein, checked 23 September 2026.
Buy Gold Standard 100% Whey Protein →See the price on AmazonBest chocolate whey
Pros
- + Double Rich Chocolate tastes of real chocolate, even with water
- + Mixes very well and is not too thick
- + 76g of protein per 100g in Double Rich Chocolate, 24g per 31g scoop
- + Only 1.0g of sugar per scoop
Cons
- – £1.23 per 25g of protein in the 4.53kg tub, dearer than Protein Works and Bulk
- – The chocolate flavour has 3g less protein per 100g than French Vanilla
●Nutrition per scoop · 23.6g protein in 31g▼
Protein makes up 76%
of this 31g scoop · 114 kcal total
I also drink Protein Works Whey Protein 360 PLATINUM in Chocolate Bueno. PLATINUM is the Protein Works tier built around taste and more complete nutrition, so it suits someone who wants more than protein from their shake. Chocolate Bueno contains 67g of protein per 100g, the same as Chocolate Silk, and costs 96p per 25g of protein in the 4.8kg bag at £122.99 on theproteinworks.com, checked 23 September 2026, so it is in the price table below.
The Protein Works tier I drink
Protein Works Whey Protein 360 Platinum
600g bag
The Protein Works tier for taste and complete nutrition, and the chocolate whey I drink myself in Chocolate Bueno.
or compare all UK prices →The Protein Works tier I drink
Pros
- + Sold in Chocolate Silk and Chocolate Bueno, the flavour I drink
- + The Protein Works tier built around taste and more complete nutrition
- + WW12 takes 12% off at Protein Works
Cons
- – A premium tier, so expect to pay more than Protein Works Whey Protein 360 Black
- – 96p per 25g of protein in the 4.8kg bag at £122.99, checked 23 September 2026
●Nutrition per scoop · 23.4g protein in 35g▼
Protein makes up 67%
of this 35g scoop · 124 kcal total
Which chocolate whey protein powder is cheapest per 25g of protein?
Bulk Basic Whey Protein in Chocolate was the cheapest chocolate whey we checked, at 56p per 25g of protein in the 2.5kg bag during Bulk Week on 23 September 2026. That is a sale price of £32.99, down from £47.99, and it comes with trade-offs covered below. The cheapest chocolate whey at a normal price was Protein Works Whey Protein 360 Black in Chocolate Silk, at 65p per 25g of protein in the 4.8kg bag at £73.49, checked 23 September 2026.
| Chocolate flavour | Protein per 100g | Bag and price | Cost per 25g of protein |
|---|---|---|---|
| Bulk Basic Whey Protein, Chocolate | 59g | 2.5kg, £32.99 (sale) | 56p |
| Protein Works Whey Protein 360 Black, Chocolate Silk | 59g | 4.8kg, £73.49 | 65p |
| Protein Works Whey Protein 360 PLATINUM, Chocolate Bueno | 67g | 4.8kg, £122.99 | 96p |
| Bulk Pure Whey Protein, Chocolate | 71g | 5kg, £139.99 (sale) | 99p |
| Myprotein Impact Whey, Chocolate Smooth | 73g | 3.6kg, £119.99 (sale) | £1.14 |
| Applied Nutrition Critical Whey, Chocolate Milkshake | 24g per serving | 2kg, £68.95 | £1.18 |
| Optimum Nutrition Gold Standard 100% Whey, Double Rich Chocolate | 76g | 4.53kg, £170 | £1.23 |
One-off prices with no code, read on bulk.com, theproteinworks.com, myprotein.com, appliednutrition.uk and optimumnutrition.com on 23 September 2026. "Sale" marks a reduced price shown against a higher one on the brand's site. Bulk's sale prices are part of Bulk Week and will end. Applied Nutrition lists 24g of protein per serving and 61 servings in the 2kg tub, so the cost is worked out from that.
The cheap end needs reading carefully. Bulk Basic Whey Protein contains 59g of protein per 100g, which is 18g of protein in a 30g serving, with 7.5g of sugar per serving, according to bulk.com's nutrition panel. That is a lot more sugar than Optimum Nutrition Gold Standard Double Rich Chocolate at 1.0g per scoop. Bulk Pure Whey Protein is the better Bulk chocolate whey: bulk.com lists 71g of protein per 100g, 23g in a 32g serving, and the Chocolate flavour cost 99p per 25g of protein in the 5kg bag at a Bulk Week price of £139.99, down from £169.99. Bulk's nutrition panel is not labelled by flavour, so we could not confirm a chocolate-specific protein figure.
Protein Works Whey Protein 360 Black is the value pick if you want a chocolate whey at a normal, non-sale price. Protein Works Whey Protein 360 Black Chocolate Silk contains 59g of protein per 100g and costs 65p per 25g of protein in the 4.8kg bag at £73.49, checked 23 September 2026. At those prices, Optimum Nutrition Gold Standard costs 89% more per 25g of protein. Black is the Protein Works tier built around taste, price and value. For every Protein Works tier compared, read our Protein Works range guide.
65p per 25g of protein
Protein Works Whey Protein 360 Black
1.2kg bag
The value chocolate whey: Chocolate Silk at 65p per 25g of protein in the 4.8kg bag, checked 23 September 2026.
or compare all UK prices →65p per 25g of protein
Protein Works Whey Protein 360 Black
1.2kg bagPros
- + 65p per 25g of protein in Chocolate Silk, the cheapest chocolate whey we found at a non-sale price
- + Sold from a 600g bag, so you can try Chocolate Silk before buying 4.8kg
- + WW12 takes 12% off at Protein Works
Cons
- – 59g of protein per 100g, well below Optimum Nutrition and Myprotein
- – The lowest price needs the biggest 4.8kg bag
●Nutrition per scoop · 17.7g protein in 30g▼
Protein makes up 59%
of this 30g scoop · 109 kcal total
Myprotein Impact Whey in Chocolate Smooth sits in the middle. Myprotein Impact Whey Chocolate Smooth contains 73g of protein per 100g, which is 22g in a 30g serving, with 113 kcal, and costs £1.14 per 25g of protein in the 3.6kg bag at £119.99, down from £127.49, on myprotein.com, checked 23 September 2026. The 900g bag at £32.99 works out at £1.26. For a head-to-head of the two best-known wheys, see our Myprotein Impact Whey vs Optimum Nutrition Gold Standard review and our Myprotein vs Optimum Nutrition price guide.
£1.14 per 25g of protein
MyProtein Impact Whey Protein Powder
1kg bag
A mid-priced chocolate whey with more protein per 100g in Chocolate Smooth than in Vanilla, at £1.14 per 25g of protein, checked 23 September 2026.
or compare all UK prices →£1.14 per 25g of protein
Pros
- + Chocolate Smooth contains 73g of protein per 100g, slightly more than Myprotein's Vanilla
- + Several chocolate flavours, from Chocolate Smooth to Chocolate Brownie
- + Sold in bags from 450g to 3.6kg
Cons
- – £1.14 per 25g of protein in the 3.6kg bag, and that was a sale price
- – Dearer per gram of protein than Protein Works and Bulk chocolate wheys
●Nutrition per scoop · 21.6g protein in 30g▼
Protein makes up 72%
of this 30g scoop · 113 kcal total
99p per 25g of protein on sale
Bulk Pure Whey Protein
1kg bag
The better-value Bulk chocolate whey while Bulk Week runs, with a less sweet chocolate option, checked 23 September 2026.
or compare all UK prices →99p per 25g of protein on sale
Bulk Pure Whey Protein
1kg bagPros
- + Chocolate cost 99p per 25g of protein in the 5kg bag at the Bulk Week price
- + 71g of protein per 100g on bulk.com's nutrition panel
- + Offers a Chocolate (Less Sweet) flavour
Cons
- – The 99p figure is a sale price: the 5kg bag lists at £169.99, which is £1.20 per 25g of protein
- – Bulk's nutrition panel is not labelled by flavour
●Nutrition per scoop · 22.7g protein in 32g▼
Protein makes up 71%
of this 32g scoop · 120 kcal total
Prices change weekly. To rank every whey by cost per 25g of protein today, use the whey concentrate comparison, or the whey isolate comparison if you want a leaner chocolate isolate. To line up two chocolate powders side by side, use the protein comparison tool.
Does chocolate protein powder have less protein than vanilla?
Often, but not always, so check the label of the chocolate flavour itself. Optimum Nutrition Gold Standard 100% Whey contains 76g of protein per 100g in Double Rich Chocolate and 74g in Extreme Milk Chocolate, against 79g in French Vanilla, according to optimumnutrition.com on 23 September 2026. Every flavour still gives 24g of protein per scoop, but the chocolate scoops are bigger: 31g for Double Rich Chocolate and 32g for Extreme Milk Chocolate, against 30g for French Vanilla. The cocoa takes up the extra room.
| Product and flavour | Protein per 100g | Scoop |
|---|---|---|
| Optimum Nutrition Gold Standard, French Vanilla | 79g | 30g, 24g protein |
| Optimum Nutrition Gold Standard, Double Rich Chocolate | 76g | 31g, 24g protein |
| Optimum Nutrition Gold Standard, Extreme Milk Chocolate | 74g | 32g, 24g protein |
| Myprotein Impact Whey, Vanilla | 72g | 30g, 22g protein |
| Myprotein Impact Whey, Chocolate Smooth | 73g | 30g, 22g protein |
Nutrition labels read on optimumnutrition.com and myprotein.com on 23 September 2026.
The difference shows up in the price. Optimum Nutrition Gold Standard costs £98 for both the 2.26kg Double Rich Chocolate tub and the 2.28kg French Vanilla tub, but that works out at £1.43 per 25g of protein for Double Rich Chocolate against £1.36 for French Vanilla, so the chocolate costs about 5% more per gram of protein, checked 23 September 2026. Myprotein Impact Whey goes the other way: Chocolate Smooth contains 73g of protein per 100g against 72g for Vanilla. If vanilla suits you just as well, our best vanilla protein powder UK guide covers that side.
Which chocolate protein powders use cocoa, and is there a less sweet one?
The three chocolate wheys whose ingredients we read all use cocoa powder, not flavouring alone. Optimum Nutrition Gold Standard Double Rich Chocolate and Myprotein Impact Whey Chocolate Smooth both list fat reduced cocoa powder, and Applied Nutrition Critical Whey Chocolate Milkshake lists cocoa powder, according to each brand's ingredients list on 23 September 2026. All three are sweetened with sucralose, and Optimum Nutrition adds acesulfame K.
If chocolate shakes taste too sweet to you, Bulk Pure Whey Protein comes in a Chocolate (Less Sweet) flavour alongside its standard Chocolate, at the same price, on bulk.com on 23 September 2026. Sugar matters too: Optimum Nutrition Gold Standard Double Rich Chocolate has 1.0g of sugar per 31g scoop and Myprotein Impact Whey Chocolate Smooth has 1.5g per 30g, against 7.5g per 30g serving for Bulk Basic Whey Protein. If you want to avoid sucralose altogether, read our guide to protein powder without artificial sweeteners.
Applied Nutrition Critical Whey Chocolate Milkshake is worth a look if you compete in a drug-tested sport. Applied Nutrition lists Chocolate Milkshake as Informed Sport tested, with 24g of protein and 122 kcal per serving, and it costs £1.18 per 25g of protein in the 2kg tub at £68.95 on appliednutrition.uk, checked 23 September 2026.
What is the best vegan chocolate protein powder?
Protein Works Vegan Protein 360 Black in Chocolate Silk is the best-value vegan chocolate protein we checked. Protein Works Vegan Protein 360 Black Chocolate Silk contains 79g of protein per 100g and costs 48p per 25g of protein in the 4kg bag at £60.99, or 60p in the 500g bag at £9.49, on theproteinworks.com, checked 23 September 2026. That is cheaper per gram of protein than every chocolate whey in this guide, because plant isolates carry more protein per 100g.
I drink Protein Works Vegan Protein 360 PLATINUM in Chocolate Bueno, which contains 79g of protein per 100g and costs 65p per 25g of protein in the 4kg bag at £82.49, checked 23 September 2026. Cocoa is good at covering the earthy taste of pea protein, which makes chocolate one of the safer flavours to try in a plant protein. For every plant option, see the best vegan protein powder UK guide and the vegan protein comparison.
48p per 25g of protein
Protein Works Vegan Protein 360 Black
2kg bag
The cheapest chocolate protein per gram in this guide, dairy-free, at 48p per 25g of protein, checked 23 September 2026.
or compare all UK prices →48p per 25g of protein
Pros
- + 48p per 25g of protein in Chocolate Silk, cheaper than any chocolate whey we checked
- + 79g of protein per 100g
- + A 500g bag at £9.49 (60p per 25g of protein) to try it first
- + WW12 takes 12% off at Protein Works
Cons
- – Plant protein has a thicker, earthier texture than whey
- – The lowest price needs the 4kg bag
●Nutrition per scoop · 19.8g protein in 25g▼
Protein makes up 79%
of this 25g scoop · 90 kcal total
Frequently asked questions
What is the best chocolate protein powder in the UK?
For most people, Optimum Nutrition Gold Standard 100% Whey in Double Rich Chocolate. It mixes very well, tastes of real chocolate even with water and is not too thick. It contains 76g of protein per 100g and costs £1.23 per 25g of protein in the 4.53kg tub at £170 on optimumnutrition.com, checked 23 September 2026.
What is the cheapest chocolate whey protein powder in the UK?
Of the chocolate wheys we checked on 23 September 2026, Bulk Basic Whey Protein in Chocolate was cheapest at 56p per 25g of protein, in the 2.5kg bag at a Bulk Week sale price of £32.99. It is only 59g of protein per 100g and has 7.5g of sugar per 30g serving. Outside a sale, Protein Works Whey Protein 360 Black in Chocolate Silk costs 65p per 25g of protein in the 4.8kg bag at £73.49.
Does chocolate protein powder have less protein than vanilla?
Often, but not always. Optimum Nutrition Gold Standard 100% Whey contains 76g of protein per 100g in Double Rich Chocolate against 79g in French Vanilla, because cocoa takes up room in the scoop. Myprotein Impact Whey goes the other way: Chocolate Smooth contains 73g per 100g against 72g for Vanilla. Both checked on the brands' own sites on 23 September 2026.
Does chocolate protein powder taste good with water?
A good one does. I mix every protein shake with water, and Optimum Nutrition Gold Standard Double Rich Chocolate still tastes of real chocolate and does not go too thick. Milk makes any chocolate shake creamier and sweeter, but it also adds calories.
What is the best vegan chocolate protein powder?
On cost per gram of protein, Protein Works Vegan Protein 360 Black in Chocolate Silk. It contains 79g of protein per 100g and costs 48p per 25g of protein in the 4kg bag at £60.99 on theproteinworks.com, checked 23 September 2026. That is cheaper per gram of protein than any chocolate whey in this guide.
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