Name: Skinny Peanut Butter Brownies
Prep time: 15 min
Cook time: 35 min
Total time: 50 min
Yield: 12
Cuisine: American
Ingredients: 12.35 ounce Pillbury sugar free brownie mix; 12 ounces Diet Coke; 2 tablespoons peanut butter powder; 1 tablespoon water; 4 ounces marshmallow creme

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Skinny peanut butter brownies are made with a lightened up brownie mix, and topped with a peanut butter and marshmallow creme topping.

peanut butter brownie slice on a white plate

I sometimes refer to this recipe as two ingredient brownies. They start out with a simple boxed sugar-free brownie mix, but rather than adding eggs and oil, I add Diet Coke. It’s crazy to think that adding just cola to a brownie mixture can make brownies, right?

The batter won’t be quite as thick as making the brownies according to the box, but it bakes into fluffy, delicious brownies.

I add some peanut butter powder into marshmallow creme, then use it to top the brownies in a nice, thin layer. It’s the perfect pop of creme and peanut butter!

chocolate peanut butter brownies on a wire rack covered in marshmallow cream frosting

Why you’ll love this recipe

Brownies with less calories
A guiltless way to indulge in a sweet treat
Made with a boxed mix for less fuss
Topped with a delicious peanut butter marshmallow creme

chocolate peanut butter brownies cut in half on a wire rack

Ingredients

What you’ll need to make this recipe.

How to make this recipe

1 – Preheat the oven to 350 degrees. Spray an 8×8-inch baking dish with nonstick cooking spray.

2 – Add the brownie mix and Diet Coke to a medium sized mixing bowl and mix together with a wooden spoon. Be careful to not over mix. Brownie mix will be runny.

3 – Pour the brownie batter into the prepared baking dish. Bake for 35-40 minutes, until brownies are cooked through. Use a toothpick to check center. Allow brownies to cool completely.

4 – In a small bowl, add the peanut butter powder and water and mix together. Add the marshmallow creme and together mix again.

5 – Spread mixture evenly over brownies. Enjoy!

How do I store my leftover brownies?

Place brownies in an airtight container and store on the countertop for 3-4 days.

Calories per serving (1/12 serving): 127

Yield: 12 Servings

Skinny Peanut Butter Brownies

Skinny peanut butter brownies are made with a lightened up brownie mix, and topped with a peanut butter and marshmallow creme topping. Perfect for a guiltless treat.

Prep Time 15 minutes

Bake Time 35 minutes

Total Time 50 minutes

Ingredients

12.35 ounce Pillbury sugar free brownie mix
12 ounces Diet Coke
2 tablespoons peanut butter powder
1 tablespoon water
4 ounces marshmallow creme

Instructions

Preheat the oven to 350°. Spray an 8x8-inch baking dish with nonstick cooking spray.
Add the brownie mix and Diet Coke to a medium sized mixing bowl and mix together with a wooden spoon. Be careful to not over mix. Brownie mix will be runny.
Pour the brownie batter into the prepared baking dish. Bake for 35-40 minutes, until brownies are cooked through. Use a toothpick to check center. Allow brownies to cool completely.
In a small bowl, add the peanut butter powder and water and mix together. Add the marshmallow creme and together mix again.
Spread mixture evenly over brownies. Enjoy!