Peanut Butter Stuffed Brownies

Peanut butter stuffed brownies are the ultimate indulgence—rich, fudgy chocolate brownies with a luscious, creamy peanut butter center. This easy recipe starts with a boxed brownie mix and transforms into a decadent dessert that’s perfect for any chocolate-peanut butter lover.

Why You’ll Love This Recipe

This recipe takes basic brownies to the next level with a sweet and salty peanut butter filling hidden inside. It’s simple, satisfying, and sure to impress guests or satisfy your own craving. The contrast between the gooey chocolate and creamy peanut butter makes every bite irresistible.

ingredients

(Tip: You can find the complete list of ingredients and their measurements in the recipe card below.)

brownie mix
eggs
oil
peanut butter
powdered sugar

directions

1. Preheat oven to 350°F (175°C) and grease or line an 8×8-inch baking pan with parchment paper.

2. Prepare the brownie mix according to the box instructions, typically mixing it with eggs and oil until well combined.

3. In a separate bowl, stir together the peanut butter and powdered sugar until smooth and creamy.

4. Pour half of the brownie batter into the prepared pan and spread evenly.

5. Drop spoonfuls of the peanut butter mixture over the batter, gently spreading it into an even layer.

6. Pour the remaining brownie batter over the peanut butter layer, smoothing the top.

7. Bake for 30–35 minutes, or until a toothpick inserted in the center comes out with only a few moist crumbs.

8. Let cool completely before slicing into squares and serving.

Servings and timing

Servings: 12
Prep Time: 10 minutes
Baking Time: 35 minutes
Total Time: 45 minutes
Calories per Serving: Approximately 310 kcal

Variations

• Add chocolate chips: Stir chocolate chips into the brownie batter for extra richness.

• Swirl method: Instead of a full layer, swirl the peanut butter mixture through the batter for a marbled effect.

• Crunchy twist: Use crunchy peanut butter for added texture.

• Nut-free version: Substitute sunflower seed butter for a peanut-free alternative.

• Double-stuffed: Add a layer of crushed Oreos or cookie dough with the peanut butter for an extra treat.

storage/reheating

Store brownies in an airtight container at room temperature for up to 3 days, or refrigerate for up to 5 days. For longer storage, freeze brownies individually wrapped for up to 2 months. To reheat, microwave for 10–15 seconds to restore gooey texture.

FAQs

Can I use homemade brownie batter?

Yes, homemade brownie recipes work just as well as boxed mix.

Should the peanut butter be natural or regular?

Regular (non-natural) peanut butter is recommended for the best texture and sweetness.

Can I add more peanut butter?

Yes, but be cautious not to overfill, which can affect baking time and structure.

Do I need to chill the peanut butter mixture first?

No chilling is necessary; just mix and layer it directly.

How do I know when the brownies are done?

Insert a toothpick—if it comes out with moist crumbs (not raw batter), they’re ready.

Can I use almond or cashew butter?

Yes, any nut butter can work—just adjust the sweetness with powdered sugar to taste.

Can I make these gluten-free?

Use a gluten-free brownie mix for a gluten-free version.

What type of pan should I use?

An 8×8-inch pan works best for thick, gooey brownies. A 9×9-inch pan can also be used for thinner results.

Can I use cocoa powder instead of brownie mix?

Not in this version—brownie mix includes flour, leavening, and sugar. Use a full homemade brownie recipe instead.

Should I refrigerate the brownies?

Only if storing more than 3 days or if you prefer firmer texture. Let them come to room temp before serving for best results.

Conclusion

Peanut butter stuffed brownies are an easy yet decadent dessert that takes just minutes to prepare and bakes into something truly special. With rich chocolate and a creamy peanut butter center, they’re the perfect fusion of flavors and textures—ideal for bake sales, potlucks, or any time you want a dessert that wows with every bite.

Peanut Butter Stuffed Brownies

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• Author: Olivia
• Total Time: 45 minutes
• Yield: 9–12 brownies
• Diet: Vegetarian

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Description

These Peanut Butter Stuffed Brownies are rich, fudgy, and loaded with a creamy peanut butter surprise in every bite! Made with a simple boxed mix and a sweet peanut butter filling, this decadent dessert is perfect for chocolate and peanut butter lovers alike. Keywords: peanut butter brownies, stuffed brownies, easy brownie recipe, chocolate peanut butter dessert, fudgy brownies with filling.

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Ingredients

• 1 box brownie mix

• 2 eggs (or as directed on the box)

• 1/2 cup oil (or as directed on the box)

• 1/2 cup peanut butter

• 1/4 cup powdered sugar

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Instructions

• Preheat oven to 350°F (175°C) and grease or line an 8×8-inch baking pan.

• Prepare brownie batter according to package instructions using eggs and oil.

• In a small bowl, mix peanut butter and powdered sugar until smooth and thick.

• Pour half of the brownie batter into the prepared pan and spread evenly.

• Drop spoonfuls of the peanut butter mixture over the batter, gently spreading or swirling if desired.

• Pour the remaining brownie batter over the top and smooth out.

• Bake for 30–35 minutes, or until a toothpick inserted near the center comes out with a few moist crumbs.

• Cool before slicing for clean layers.

Notes

• Use crunchy peanut butter for added texture.

• Add a sprinkle of chocolate chips or chopped peanuts on top for extra indulgence.

• These brownies freeze well—perfect for make-ahead treats.

• Prep Time: 10 minutes
• Cook Time: 35 minutes
• Category: Dessert
• Method: Baking
• Cuisine: American