

🎉 Snack like a boss with ONE — where flavor meets fuel!
ONE Protein Bars in Birthday Cake flavor deliver 20 grams of whey protein isolate and just 1 gram of sugar per gluten-free, kosher-certified bar. Designed for busy professionals and fitness enthusiasts, these bars offer a delicious, portable snack option that supports muscle recovery and sustained energy. Shipped with cold packs to ensure freshness, they’re the perfect pantry staple for anyone who refuses to compromise on taste or nutrition.












| ASIN | B0171F2HL6 |
| Age Range Description | Adult |
| Allergen Information | Milk |
| Best Sellers Rank | #946 in Health & Household ( See Top 100 in Health & Household ) #7 in Sports Nutrition Protein Bars #202 in Sales & Deals |
| Brand | ONE |
| Brand Name | ONE |
| Coin Variety 1 | Protein Bar |
| Color | Birthday Cake |
| Container Type | Box |
| Cuisine | American |
| Customer Reviews | 4.4 out of 5 stars 26,265 Reviews |
| Diet Type | Gluten Free |
| Flavor | Birthday Cake |
| Global Trade Identification Number | 00788434108096 |
| Item Dimensions | 7 x 6.25 x 2 inches |
| Item Form | Bar |
| Item Package Weight | 0.77 Kilograms |
| Item Weight | 1.5 Pounds |
| Manufacturer | ONE Brands |
| Material Features | Gluten Free |
| Net Content Weight | 2.12 Ounces |
| Number of Items | 1 |
| Number of Pieces | 12 |
| Package Type Name | R |
| Product Benefits | High Protein |
| Protein | 20 Grams |
| Protein Source | Whey |
| Size | 12 Count (Pack of 1) |
| Snack Food Bar Type | Protein |
| Specialty | High Protein |
| Total Eaches | 12 |
| Type | Protein |
| UPC | 788434108096 |
| Unit Count | 25.44 Ounce |
| Vitamins And Minerals | 10, 140, 3, 6 Milligrams |
J**E
Tasty, high protein and low sugar!
These are the best protein bars ever! Great taste, filling, and low sugar!
A**R
Best Flavor. 1g sugar. 20g protein
The best flavor out of all of the ONE bars. Usually sold out in local stores. Glad to see it on amazon. Best Flavor. 1g sugar. 20g protein. Received very fresh. Has good texture.
N**.
Love the taste
Excellent on the go low calories and a good price.
R**Y
Good sweet craving
Really happy with these ONE Protein Bars in the Birthday Cake flavor. The texture is soft and not too chewy, and the flavor actually tastes like birthday cake without being overly sweet. 20g of protein and only 1g of sugar makes them a great grab-and-go snack. I took off one star because the aftertaste is a tiny bit artificial
H**L
Great product
I've FINALLY found a gluten free protein bar that my 92 year old mom will eat. It's hard to meet her daily protein requirements, this product is perfect. I tried one myself, really tastes good and has low sugar. Definitely buying this again.
R**.
Good taste, slight expensive for 12
Good taste, slight expensive for 12
L**R
taste
One of my favorite protein bar with minimal sugar and plenty of protein.
C**L
New Blueberry Cobbler Recipe is DIFFERENT AND WORSE
As of early January 2026, they have changed the recipe of the blueberry cobbler, getting rid of the cocoa butter and subbing in almond butter. Not sure what else they did, but if you enjoyed the sweetness of the old ones, and the easy to chew texture, the bars are COMPLETELY different, lost the smooth sweetness, made the texture more coarse, and the colors are awful, more brownish as if they've all gone off. You'll noticed the wrapper is slightly different. The one on the top is the GOOD, old version. The darker label is the newer version. If you sub and save to these bars, you may want to cancel. I cannot believe they messed with "my" recipe. These were my go-to, "guilty pleasure" on a fairly low sugar diet. They were filling, had an ok amount of sugar alcohols, and if you eat too much in a day, your tummy wouldn't thank you, but I'd rate them five stars every time. It's so hard to get good fruity flavors in a chewy protein bar. Now I have to go searching and spending money trying new bars to find a new favorite. Oh well! I just wanted to warn everyone that they did change and NOT for the better!!!
Trustpilot
1 week ago
2 weeks ago