If you’re craving something rich, fudgy, and incredibly easy, these peanut butter chocolate brownies are the perfect treat.
This recipe uses a simple brownie box mix and elevates it by incorporating peanut butter chips, topping it with a store-bought frosting, and adding a creamy peanut butter drizzle.
You’ll have a decadent dessert that tastes completely homemade. No one will guess it all started with an easy brownie box mix.
Keep reading to get a peanut butter brownie recipe that your family will love.
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Ingredients for this chocolate peanut butter brownies recipe
This recipe is going to look different from the one on the back of the brownie box mix. To enhance the flavor, some ingredients have been omitted and other ingredients have been added.
To make these peanut butter chocolate brownies, you’ll need the following ingredients:
- ⅔ cup of melted butter
- ¼ cup of water
- 2 large eggs
- 1 egg yolk
- 1 teaspoon of pure vanilla extract
- 1 Pillsbury chocolate fudge brownie mix (18.4 ounces)
- 1 teaspoon of sea salt
- 1 cup of peanut butter chips
- 1 tub of Pillsbury sugar-free chocolate fudge frosting (15 ounces)
- ⅓ cup of creamy peanut butter
You’ll also need a 13 x 9-inch baking pan, a piece of parchment paper, a hand mixer, and a piping bag.
How to make peanut butter fudge brownies from a box mix
Please note that the ingredients in this recipe specify an 18.4-ounce Pillsbury chocolate fudge brownie box mix. You can use any brand of brownie mix that is the same size.
If you substitute another brand, use the amount of water called for on that box. Substitute the oil with an equal amount of melted butter, and add one extra egg yolk.
Start by preheating the oven to 350°F (180°C). Line a 13 x 9-inch baking pan with parchment paper.
Place the eggs, egg yolk, vanilla, water, and melted butter in a large bowl.
Use a hand mixer to beat the ingredients on medium speed for 2-3 minutes until the mixture is light and fluffy.
Add the boxed brownie mix and 1 teaspoon of salt into the egg and butter mixture.
Reduce the speed to low and gently beat just until the brownie mix is incorporated – about 1-2 minutes.
Use a spatula to fold in the peanut butter chips. Make sure they are evenly dispersed throughout the brownie batter.
Spread the peanut butter brownie batter into the prepared baking pan and smooth the top of the batter with a spatula.
Bake in the preheated oven for 31-34 minutes. Note that this amount of time is 3 minutes more than the box asks for. This accounts for the added ingredients.
You’ll know the chocolate peanut butter brownies are cooked when a toothpick inserted into the center of the brownie pan comes out clean.
Remove the pan from the oven and let the brownies begin to cool in the pan for 15 minutes.
Use the edges of the parchment paper to remove the brownies from the baking pan. Transfer them to a wire rack, and allow them to cool completely.
Spread the chocolate fudge frosting mix over the cooled peanut butter brownies.
Put the creamy peanut butter into a piping bag. Snip off the small end of the bag with kitchen scissors and twist the top end so that it is tightly closed.
Drizzle the peanut butter over the top of the brownies to decorate them and add flavor.
Cut the brownies into 18 even-sized pieces. Store in an air-tight container. The brownies can also be frozen to have later.
More elevated boxed brownie recipes
Boxed brownies are a great starting point for delicious desserts. If you’re looking for more things to add to brownies, try these recipes:
- Heavenly Heath Bar Brownies – The chocolate ganache and English toffee bits make this brownie recipe a keeper.
- Box Mix Brownies with M&M add ins – An easy and fun dessert the kids will love.
- How to Make Brownies from Cake Mix – This brownie recipe starts with a boxed cake mix (instead of a brownie mix)!
Share this peanut butter chocolate brownie recipe on X
If you enjoyed learning how to make box brownies better, why not share this recipe with a friend? Here is a post to get you started:
Box mix brownies just got an upgrade! 🍫🥜 Simply add peanut butter chips, top the brownies with chocolate frosting, and a peanut butter drizzle to elevate a boxed brownie mix. #BrownieRecipe #PeanutButterChocolate #EasyDessert… Share on X
Pin this box mix peanut butter brownies recipe
Would you like a reminder on how to upgrade your boxed brownie mix? Just pin this image to one of your dessert boards on Pinterest so that you can easily find it later.
You can also watch this YouTube slideshow video about making chocolate peanut butter brownies!
Peanut Butter Fudge Brownies Recipe Made from a Box Mix with Add Ins!
These box mix peanut butter fudge brownies rival any decadent restaurant brownie dessert.
They are super easy to prepare and always a hit at potluck dinners.
Ingredients
- ⅔ cup of melted butter
- ¼ cup of water
- 2 large eggs
- 1 egg yolk
- 1 teaspoon of pure vanilla extract
- 1 Pillsbury chocolate fudge brownie mix (18.4 ounces)
- 1 teaspoon of salt
- 1 cup of peanut butter chips
- 1 tub of Pillsbury sugar-free chocolate fudge frosting (15 ounces)
- ⅓ cup of creamy peanut butter
Instructions
- Preheat the oven to 350°F (180°C).
- Line a 13 x 9-inch baking pan with parchment paper.
- Place the eggs, egg yolk, vanilla, water, and melted butter in a large bowl.
- Mix on medium speed with a hand mixer for 2-3 minutes until the mixture is light and fluffy.
- Add the bagged brownie mix and 1 teaspoon of salt.
- Reduce the speed to low and just mix until blended (1-2 minutes).
- Use a spatula to fold in the peanut butter chips and mix until they are evenly dispersed throughout the batter.
- Spread the mixture into the prepared baking pan and smooth the top with a spatula.
- Bake in the preheated oven for 31-34 minutes. This is 3 minutes more than the box asks for, to account for the added ingredients.
- The chocolate peanut butter brownies will be cooked when a toothpick inserted into the center comes out clean.
- Remove the pan and begin cooling the brownies in the pan for 15 minutes.
- Then, remove the brownies from the baking pan, transfer to a wire rack, and let them cool completely.
- Spread the chocolate fudge frosting mix over the cooled brownies.
- Put the creamy peanut butter into a piping bag. Snip off the end of the bag and drizzle the peanut butter over the top of the brownies.
- Cut into 18 even-sized pieces.
- Store in an air-tight container.
- Enjoy!
Notes
The recipe calls for sugar-free frosting. You can use normal chocolate frosting if you prefer.
Other brands of brownie mixes will work in this recipe. If using another boxed mix, substitute the amount of oil called for on the box with the same amount of melted butter, and add an extra egg yolk, 1 teaspoon of salt, and 1 teaspoon of pure vanilla extract.
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Nutrition Information:
Yield:
18Serving Size:
1Amount Per Serving: Calories: 242Total Fat: 18gSaturated Fat: 9gTrans Fat: 1gUnsaturated Fat: 7gCholesterol: 58mgSodium: 256mgCarbohydrates: 16gFiber: 1gSugar: 12gProtein: 5g
Nutritional information is approximate due to natural variation in ingredients and the cook-at-home nature of our meals.