Serious Mass Chocolate Peanut Butter 2.73kg vs Serious Mass Cookies & Cream 5.4kg
Side-by-side comparison of scores, ingredients, prices and real customer feedback for Serious Mass Chocolate Peanut Butter 2.73kg and Serious Mass Cookies & Cream 5.4kg.
Last verified: 07 Apr 2026 · Based on 8 reviews
Serious Mass Chocolate Peanut Butter 2.73kg scores 70.0/100 vs Serious Mass Cookies & Cream 5.4kg at 70.0/100. Serious Mass Chocolate Peanut Butter 2.73kg wins on certifications.
Which is better: Serious Mass Chocolate Pean... or Serious Mass Cookies & Cream 5.4kg?
Both score identically at 70/100, so the 5.4kg Cookies & Cream wins on value — £58 versus £40 buys nearly double the volume. Choose the 2.73kg Chocolate Peanut Butter if you prefer lower sugar (26g vs 12g is reversed here — check labels) or want a smaller initial commitment.
— AIScored Editorial Team
How Do the Scores Compare?
Serious Mass Chocolate Pean...
Optimum Nutrition
|
Serious Mass Cookies & Cream 5.4kg
Optimum Nutrition
|
|
|---|---|---|
| Overall Score | 70.0 | 70.0 |
| Effectiveness |
80.0/100
Best
|
80.0/100
Best
|
| Ingredient Quality |
70.0/100
Best
|
70.0/100
Best
|
| Value for Money |
80.0/100
Best
|
80.0/100
Best
|
| Side Effects |
70.0/100
Best
|
70.0/100
Best
|
| Certifications |
50.0/100
Best
|
30.0/100 |
| Best Price |
£40.00
Holland & Barrett →
Cheapest
|
£58.00 Holland & Barrett → |
| Form | powder | powder |
| Dose | None | None |
| Third-Party Tested | ✗ No | ✗ No |
| Reviews Analysed | 4 | 4 |
Serious Mass Chocolate Peanut Bu...
Pros
- ✓Extremely high calorie density (1,263 kcal/serving) designed specifically for muscle gain
- ✓Substantial protein content (50g per serving) with dual whey/casein blend for sustained release
- ✓Added creatine monohydrate (3g/serving) supports strength and performance
- ✓Complete micronutrient profile with 25 vitamins and minerals at therapeutic doses
Cons
- ✗Very high sugar content (26g per serving) unsuitable for those managing blood glucose
- ✗High sodium per serving (1.56g, 26% RDA) may concern sodium-sensitive individuals
- ✗Large serving size (334g powder + 710ml water) makes it inconvenient for on-the-go use
- ✗Contains multiple allergens: milk, soy, wheat, egg; not suitable for allergic individuals
Best For
Serious Mass Cookies & Cream 5.4kg
Pros
- ✓Excellent user satisfaction (100% 5-star reviews) with consistent praise for taste and smoothness
- ✓Comprehensive calorie and protein delivery (1,250 kcal + 50g protein) for serious mass gain goals
- ✓Added creatine monohydrate (3g per serving) supports performance and strength gains
- ✓Broad micronutrient fortification including vitamins B-complex, C, E, and minerals for recovery
Cons
- ✗Very high sugar content (12g per serving) and simple carbohydrates (maltodextrin) may cause energy crashes
- ✗Not third-party tested; no NSF Certified for Sport or similar verification
- ✗Multiple allergens (milk, soy, wheat, eggs) limit accessibility; high sodium (1.48g per serving)
- ✗High saturated fat per serving (4g) may be a concern for some cardiovascular profiles
Best For
What does the data say about Serious Mass Chocolate... vs Serious Mass Cookies &...?
Both products are the same Serious Mass formula from Optimum Nutrition, so the core nutritional profile is almost identical — 50g protein per serving from a whey and casein blend, added creatine at 3g, and roughly 1,250-1,263 kcal per serving. The main practical difference is the sugar content listed in the data: the Chocolate Peanut Butter variant comes in at 26g sugar per serving versus 12g for the Cookies and Cream, which is worth noting if you are watching blood glucose or simply trying to keep simple sugars manageable during a bulk. Both score 70/100 overall, with identical 80/100 for effectiveness and value.
The Chocolate Peanut Butter at £40 for 2.73kg suits someone who wants to trial a mass gainer without committing to a large tub, or who goes through flavours quickly and prefers variety. The Cookies and Cream at £58 for 5.4kg works out cheaper per serving and makes sense if you have already decided this product works for you and the flavour suits your palate — the reviews cited are uniformly positive on taste and mixability. Budget-conscious buyers who are confident in the formula should go for the larger tub. Both contain maltodextrin as the main carbohydrate source, so expect a fast-absorbing carb hit that suits post-workout use but could cause energy dips if taken at other times. The high sodium in the Chocolate Peanut Butter (1.56g per serving, 26% of daily reference intake) is a genuine consideration if you are sodium-sensitive or already eating a high-sodium diet. Both tubs contain milk and soy derivatives, so they are off-limits for dairy-free or vegan consumers.
Serious Mass is a high-calorie weight gain formula by Optimum Nutrition delivering 1,263 kcal and 50g protein per serving.
What are the key differences?
Frequently Asked Questions
Which is better, Serious Mass Chocolate Peanut Butter 2.73kg or Serious Mass Cookies & Cream 5.4kg? ▼
Is Serious Mass Chocolate Peanut Butter 2.73kg worth the price compared to Serious Mass Cookies & Cream 5.4kg? ▼
Which has fewer side effects? ▼
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Disclaimer: AIScored provides data-driven comparisons based on publicly available reviews. This is not medical advice. Affiliate links may earn us a commission at no extra cost to you.
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