These Sugar-Free Reese’s Peanut Butter Marshmallow Protein Bars are soft, fluffy, high-protein, and no-bake, made with peanut butter protein and chocolate sprinkles.

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Reese’s Marshmallow Protein Bars

If you love Reese’s Peanut Butter Cups, you need to try these Reese’s Peanut Butter Marshmallow Protein Bars! They’re a fun twist on my viral 3-Ingredient Marshmallow Protein Bars, combining a soft, fluffy marshmallow texture with peanut butter protein and chocolate sprinkles.

These easy no-bake protein bars are made with Equip Foods Peanut Butter Prime Protein and finished with Good Dee’s sugar-free chocolate sprinkles for that classic peanut butter and chocolate combination.

Want even more peanut butter flavor? Add 1–2 tablespoons of pure peanut powder to the mixture before whipping. It’s completely optional, but highly recommended if you’re a serious peanut butter lover!

Why You’ll Love These Reese’s Protein Bars

These peanut butter marshmallow protein bars are:

Soft and fluffy
Light and marshmallow-like
Packed with protein
No-bake
Easy to make
Inspired by Reese’s Peanut Butter Cups
Made with peanut butter protein powder
Topped with chocolate sugar-free sprinkles
Easy to customize with extra peanut powder
Perfect for meal prep
Great for a sweet snack or post-workout treat

What Makes These Reese’s Marshmallow Protein Bars?

The base of these bars comes from my original viral 3-Ingredient Marshmallow Protein Bars. Milk, gelatin, and protein powder are whipped together to create an incredibly light and fluffy marshmallow texture.

For this Reese’s-inspired version, I use Equip Foods Peanut Butter Prime Protein to give the bars their peanut butter flavor.

Then comes the chocolate! Good Dee’s sugar-free chocolate sprinkles are sprinkled over the top before the bars go into the refrigerator. The combination of peanut butter and chocolate makes these taste like a fluffy, protein-packed version of a classic Reese’s treat.

Want Extra Peanut Butter Flavor?

If you want these bars to have an even stronger peanut butter flavor, add 1–2 tablespoons of pure peanut powder to the mixture along with the protein powder.

This is completely optional, but it’s an easy way to make the peanut butter flavor more pronounced.

If you love peanut butter, I definitely recommend trying the extra peanut powder version!

Sugar-Free Reese’s Marshmallow Protein Bars [low-carb + low-calorie]

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Author: Healthy Helper
Prep Time: 20 minutes
Cook Time: overnight
Total Time: 0 hours
Yield: 16 bars
Diet: Gluten Free

Ingredients

Scale

400 ml fat-free Fairlife milk
50g NuNaturals gelatin (code healthyhelper saves)
50 grams Equip Foods Peanut Butter Prime Protein (code healthyhelper saves)
1–2 tablespoons pure peanut powder, optional (code healthyhelper saves)
Good Dee’s sugar-free chocolate sprinkles, for topping (code healthyhelper saves)

Instructions

Line an 8×8-inch baking pan or loaf pan with parchment paper.
Add the milk and gelatin to a saucepan and allow the gelatin to bloom according to the package directions.
Heat over low heat, stirring until the gelatin has completely dissolved. Do not boil.
Transfer the mixture to a high-speed blender or food processor.
Add the Peanut Butter Prime Protein and optional peanut powder.
Blend until thick, fluffy, and significantly increased in volume.
Pour into the prepared pan and smooth the top.
Sprinkle generously with Good Dee’s chocolate sugar-free sprinkles.
Refrigerate for at least 6 hours, or overnight, until completely set.
Remove from the pan, slice into bars, and enjoy!

Tips For Making Peanut Butter Marshmallow Protein Bars

Whip the mixture well. The whipping process is what creates the signature fluffy marshmallow texture, so give the mixture plenty of time to increase in volume.

Don’t boil the gelatin mixture. Heat the milk and gelatin gently until the gelatin is fully dissolved.

Use a high-speed blender. A powerful blender or food processor helps create the light, airy texture these bars are known for.

Add the chocolate sprinkles before refrigerating. Sprinkle them over the freshly poured mixture so they stick to the surface as the bars set.

Try the extra peanut powder. For a stronger peanut butter flavor, add 1–2 tablespoons of pure peanut powder along with the protein powder.

Let them fully set. Refrigerate for at least 6 hours. Overnight is even better if you want the bars to be completely firm.

How To Store Reese’s Protein Bars

Store these peanut butter marshmallow protein bars in an airtight container in the refrigerator.

For the best texture, keep them refrigerated and enjoy within about one week.

If you’re stacking the bars, place parchment paper between the layers to prevent them from sticking.

Frequently Asked Questions

Can I Add Peanut Powder To These Protein Bars?

Yes! If you want extra peanut butter flavor, add 1–2 tablespoons of pure peanut powder to the mixture along with the peanut butter protein powder.

What Protein Powder Should I Use?

This recipe was created specifically with Equip Foods Peanut Butter Prime Protein. The peanut butter flavor works perfectly with the chocolate sprinkles for a Reese’s-inspired flavor combination.

Can I Skip The Peanut Powder?

Absolutely. The peanut powder is completely optional. The recipe will still have a peanut butter flavor from the Equip Foods Peanut Butter Prime Protein.

Do These Protein Bars Taste Like Reese’s?

They’re inspired by the classic Reese’s peanut butter and chocolate combination. The peanut butter marshmallow base paired with chocolate sprinkles gives you that familiar flavor combination in a soft, fluffy protein bar.