

🔥 Elevate your snack game with protein-packed indulgence!
Optimum Nutrition Marshmallow Protein Bars deliver 20g of high-quality protein per 65g bar with no added sugar*, combining great taste and texture in flavors like Marshmallow Crunch and Nutty Chocolate Caramel. Designed for active professionals and athletes, these vegetarian-friendly bars offer a crunchy, satisfying snack ideal for pre- or post-workout nutrition or anytime energy boosts.











| ASIN | B0C541XRG8 |
| Age Range Description | Adult |
| Allergen Information | Contains: Egg may contain, Milk, Peanuts may contain, Soy, Wheat |
| Benefits | High Protein |
| Best Sellers Rank | 3,952 in Health & Personal Care ( See Top 100 in Health & Personal Care ) 19 in Nutritional Protein Bars |
| Brand | Optimum Nutrition |
| Brand Name | Optimum Nutrition |
| Coin Variety 1 | Marshmallow |
| Country of Origin | United Kingdom |
| Customer Reviews | 4.1 out of 5 stars 271 Reviews |
| Flavour | Marshmallow Crunch |
| Item Dimensions | 28 x 15.5 x 5.5 centimetres |
| Item Form | Bar |
| Item Package Weight | 0.73 Kilograms |
| Item Weight | 0.68 Kilograms |
| Item height | 5.5 centimetres |
| Manufacturer | Optimum Nutrition |
| Manufacturer Contact Information | OPTIMUM NUTRITION: 4 Waterside, Citywest Business Campus, Dublin 24, Ireland. |
| Material Features | No Added Sugar |
| Net Content Weight | 0.72 Kilograms, 650 Grams |
| Number of Items | 10 |
| Number of Pieces | 10 |
| Number of items | 10 |
| Package Type Name | Box |
| Product benefits | High Protein |
| Protein | 31 g |
| Snack Food Bar Type | Protein |
| Specialty | No Added Sugar |
| Total Eaches | 10 |
| Type | Protein |
| Unit Count | 650.0 gram |
| Unit count | 650.0 gram |
B**N
Tastes Like a Treat, Performs Like a Pro
Why I Bought It: I needed a quick, high-protein snack for post-gym recovery that didn't taste like cardboard. I'm a huge fan of chocolate and coconut, so I had high hopes for this flavor. Taste & Texture (The Pros): Great Flavor (4.5/5): It truly delivers on the promise of sweet coconut and chocolate. It has a rich, slightly decadent flavor that genuinely curbs my cravings for actual candy bars. It’s sweet, but not artificially so. Excellent Protein Count: With 18g of protein and a solid 19g of carbs, this bar is perfectly balanced for that critical post-workout recovery window, or as a substantial meal replacement when traveling. Good Texture: It has a dense, slightly chewy center and is coated in a thin layer of real chocolate. Unlike some bars that are rock-hard or dry, this one is moist and easy to eat. Practical Use & Nutrition (The Cons): Not Low Calorie/Low Fat: At 255 calories and 12g of fat, this is on the higher end for a protein bar. If you are strictly cutting fat or calories, you'll need to account for it, but it's great for sustained energy or bulking. Sugar Content: The 12g of sugar is higher than some zero-sugar alternatives. While it helps with the delicious taste and provides quick post-workout energy, it might be a drawback for very low-carb diets. Melting Hazard: Because it has a real chocolate coating, be careful leaving it in a hot car or gym bag! Final Verdict: If you want a delicious, satisfying, and effective protein bar that works perfectly as a post-workout recovery tool (carbs + protein) or a heavy-duty snack, the Chocolate Sweet Coconut flavor is a winner. It loses one star only because of the higher fat/sugar content compared to some competitors, but if you prioritize taste and efficacy, this is one of the best out there.
G**E
Great taste and texture
Have been using these for a while and they make a great change from regular protein bars. They are basically the protein version of a rice crispy cake. Taste much better than most protein bars and are also filling after workouts. Would recomend them over many other bars...
M**S
Synthetic
It has a synthetic taste but it’s still quite nice
D**N
Avoid - piece of plastic found!!
Decided to try a different protein bar and had the marshmallow and chocolate brownie flavours. Unfortunately I found a piece of blue plastic embedded in one of my bars. This concerned me as I had already consumed most of them and not checked them all as closely so I could have eaten multiple pieces. I reached out to the company a few days ago and am yet to receive a response. Won't be ordering again. Other than that they do taste quite nice and are quite filling. Have something in the ingredients that makes me a little gassy but some protein bars have that effect, others don't.
A**S
Tasty
These are so good and remind me of rice crispy treats but these are high protein and high fibre. I’ve tried the marshmallow and the brownie flavour but I always come back to the marshmallow. Highly recommended
J**T
Nice but too small
Taste great, used to love them but noticed they've got significantly smaller since my previous order! The wrapper is still the same size but the bar is about 30% smaller.
A**R
Excellent
These are delicious with a nice crunchy layer. Proteins contact excellent and good for after a gym session. Sugar content is zero. The goods arrived on time and were packaged well. Price and quality good. Would recommend this product and seller.
F**O
Perfect, ignore the bad reviews
Perfect, saw the feel bad reviews but crossed my fingers and ordered anyway and they are perfect. Taste great and the coconut filling is lovely - and not yellow!!
Trustpilot
3 days ago
4 days ago