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Skinny chocolate 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.
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!
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
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
Skinny Chocolate Peanut Butter Brownies
Skinny chocolate 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.
Ingredients
- 12.35 oz Pillbury sugar free brownie mix
- 12 oz Diet Coke
- 2 tbsp peanut butter powder
- 1 tbsp water
- 4 oz 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!
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Nutrition Information:
Yield:
12Amount Per Serving: Calories: 127Total Fat: 2gSaturated Fat: 0gTrans Fat: 0gUnsaturated Fat: 0gCholesterol: 0mgSodium: 100mgCarbohydrates: 32gFiber: 4gSugar: 6gProtein: 1g
Nutritional information is only an estimate. The accuracy of the nutritional information for any recipe on this site is not guaranteed.
Other recipes you’ll love
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Lemon Cake With Pineapple Filling
Chocolate Cupcakes With Whipped Chocolate Frosting
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Enjoy!
These brownies are super delish! I can’t believe they are low cal!!
Thanks, Alison! 🙂
I love love love that I can indulge in something sweet and not have to worry about the calories as much! Stellar idea – thank you! Making this weekend!
Thanks, Jenn! 🙂
The addition of the diet coke is such a interesting ingredient. I had to try it for myself. It did bake up nice and fluffy.
That’s great to hear, Angela. 🙂
These brownies look fantastic. One of the best combination ever. Thanks for sharing
Thanks, Kushigalu. 🙂
I think everybody needs a recipe like this one. Skinny chocolate peanut butter brownies! to die for. 🙂
Thanks, Lizet! 🙂
I’ve never seen diet coke in brownies!! I have a friend who LIVES for diet coke. She’s going to love this recipe. 🙂
That’s great, Sharon! I hope she enjoys it. 🙂
I love the peanut butter chocolate combo. A healthier version of the classic treat is perfect. Now I can enjoy it when I crave something sweet.
Thanks, Gloria. I hope you enjoy them. 🙂
I’m not sure the sweetener in diet coke is heat-stable. So I’m leery of doing that. I might try this with unsweetened Seltzer water, though.
I’ve never tried using seltzer water. Let me know how it goes. 🙂