Fudgy Peanut Butter Brownies

Category: Sweet Treats and Baked Goods

These decadent brownies combine rich chocolate with creamy peanut butter for an irresistible treat. Melted butter and chocolate chips create a fudgy base, while a generous peanut butter swirl adds visual appeal and complementary flavor. The balance of wet ingredients ensures moistness, while precisely measured dry ingredients provide the perfect structure. Baked until just set with a protective foil cover to prevent over-browning, these brownies develop that coveted crackly top and dense, fudgy interior that chocolate lovers crave.

Fatiha
By Fatiha Fatiha
Last updated Sat, 04 Oct 2025 18:52:01 GMT
A cupcake with white frosting and a brown filling. Pin
A cupcake with white frosting and a brown filling. | zestplate.com

These irresistible peanut butter chocolate brownies combine the rich indulgence of fudgy chocolate with swirls of creamy peanut butter. The recipe transforms simple ingredients into a decadent dessert that balances sweetness with the deep flavor of cocoa.

I developed this recipe during a rainy weekend when my children were begging for something special. The combination of chocolate and peanut butter was such a hit that it has become our go to comfort dessert for movie nights and special occasions.

Ingredients

  • Unsalted butter provides a rich base and allows you to control the salt content
  • Semisweet chocolate chips create both the batter base and delightful chocolate pockets throughout
  • Large eggs bind everything together while adding structure and richness
  • Vanilla extract enhances all the flavors without overpowering
  • Creamy peanut butter creates beautiful swirls and balances the chocolate intensity
  • All purpose flour gives structure while keeping brownies tender
  • Unsweetened cocoa powder intensifies the chocolate flavor without additional sweetness
  • Salt balances the sweetness and enhances chocolate notes
  • Granulated sugar provides sweetness and helps create that crackly top
  • Light brown sugar adds moisture and a subtle caramel undertone

How To Make Peanut Butter Chocolate Brownies

Prepare the Pan
Preheat your oven to 350°F and prepare your baking pan with spray and parchment paper. The parchment creates handles that make removing the brownies intact much easier.
Create the Chocolate Base
Melt the butter over medium heat taking care not to let it brown. Remove from heat and immediately whisk in half the chocolate chips until completely smooth. This melting technique preserves the chocolate flavor better than microwaving.
Prepare Dry Ingredients
Sift the flour and cocoa powder together to eliminate any lumps that could create dry pockets in your brownies. Whisking in the salt ensures it distributes evenly throughout.
Combine Wet and Dry
Whisk sugars eggs and vanilla into your slightly cooled chocolate mixture until glossy and smooth. The mixture should fall from the whisk in a thick ribbon. Fold in the dry ingredients using a gentle hand stopping as soon as no dry spots remain.
Add Texture and Pour
Fold in the remaining chocolate chips for pockets of melted chocolate throughout the brownies. Pour your batter into the prepared pan spreading it evenly into the corners.
Create Peanut Butter Magic
Drop spoonfuls of peanut butter across the surface then use a knife to create beautiful swirls. Avoid over swirling which can muddy the distinct patterns.
Bake With Care
Bake until the center is just set remembering that brownies continue cooking slightly after removal. The parchment cover after 25 minutes prevents the peanut butter from becoming too dark.

The unsweetened cocoa powder is truly the secret ingredient in this recipe. I discovered its importance after accidentally using hot chocolate mix once which resulted in overly sweet brownies with less chocolate intensity. The pure cocoa powder creates that rich chocolate foundation that makes these brownies truly special.

Storage and Serving

Store these brownies in an airtight container at room temperature for up to 4 days. For longer storage refrigerate for up to a week though the texture becomes slightly more dense. To freeze wrap individual pieces in plastic wrap then place in a freezer bag removing as much air as possible. Thaw at room temperature for about an hour before serving.

Perfect Pairing Ideas

These brownies shine when served slightly warm with a scoop of vanilla ice cream. The contrast between the warm fudgy brownie and cold creamy ice cream creates a sensational dessert experience. For an elevated presentation dust with a light coating of powdered sugar just before serving or drizzle with additional melted chocolate.

A peanut butter and chocolate dessert.
A peanut butter and chocolate dessert. | zestplate.com

Ingredient Substitutions

If you need to make substitutions the recipe remains quite flexible. For a dairy free version substitute the butter with coconut oil at a 1 to 1 ratio though this will add a slight coconut flavor. Natural peanut butter works beautifully but requires additional stirring to incorporate the oils. Almond or cashew butter can replace peanut butter for those with peanut allergies. For a less sweet version reduce both sugars by ¼ cup each without affecting the texture significantly.

A cupcake with white frosting and a brown center.
A cupcake with white frosting and a brown center. | zestplate.com

Recipe FAQs

→ Can I use crunchy peanut butter instead of creamy?

Yes! Crunchy peanut butter works beautifully in this recipe, adding delightful texture contrast to the fudgy brownies. The peanut pieces will create little pockets of nutty crunch throughout. Just ensure you still swirl it properly through the batter.

→ How do I know when these brownies are fully baked?

The brownies are done when the center is set but still slightly soft. A toothpick inserted 2 inches from the edge should come out with a few moist crumbs (not wet batter). Remember that brownies continue to firm up as they cool, so it's better to slightly underbake than overbake.

→ Can I double this recipe for a larger pan?

Absolutely! This recipe doubles well for a 9x13 inch pan. Keep in mind that the baking time might need to be adjusted by 5-10 minutes. Start checking at the 35-minute mark and watch for that set center while maintaining the fudgy texture.

→ How should I store these brownies?

Store completely cooled brownies in an airtight container at room temperature for up to 4 days. For longer storage, wrap individual pieces in plastic wrap and freeze for up to 3 months. Thaw at room temperature before serving.

→ Why do you cover with foil partway through baking?

The foil covering prevents the peanut butter swirl from over-browning or burning while allowing the rest of the brownie to finish baking properly. This technique ensures a perfectly baked brownie with an attractive peanut butter pattern on top.

→ Can I add additional mix-ins to this recipe?

Definitely! Consider adding 1/2 cup of chopped peanuts, peanut butter chips, or even crushed pretzels for added texture and flavor. Just fold them in gently with the chocolate chips to maintain the brownie's fudgy consistency.

Peanut Butter Chocolate Brownies

Fudgy chocolate squares with creamy peanut butter swirls - the perfect balance of rich cocoa and nutty sweetness in every bite.

Preparation Time
15 min
Cooking Time
45 min
Total Duration
60 min
By Fatiha: Fatiha

Category: Desserts

Skill Level: Intermediate

Cuisine: American

Output: 9 Servings (9 brownies)

Dietary Preferences: Vegetarian

Ingredients

→ Wet Ingredients

01 227g unsalted butter
02 175g semisweet chocolate chips, divided
03 3 large eggs
04 1 tablespoon vanilla extract
05 ½ cup creamy peanut butter

→ Dry Ingredients

06 150g all purpose flour
07 50g unsweetened cocoa powder
08 1 teaspoon salt
09 200g granulated sugar
10 220g firmly packed light brown sugar

Directions

Step 01

Preheat oven to 350°F (175°C). Spray an 8x8 inch square baking pan with baking spray and line with parchment paper.

Step 02

Melt butter in a small saucepan over medium heat. Remove from heat, whisk in 87g chocolate chips until fully melted. Transfer to a large bowl and let cool briefly.

Step 03

In a separate bowl, sift together flour and cocoa powder. Whisk in salt.

Step 04

Whisk sugars, eggs, and vanilla into the melted chocolate mixture until smooth. Fold in the flour mixture until just combined, then fold in remaining chocolate chips.

Step 05

Pour batter into prepared pan. Drop peanut butter by teaspoonfuls over the top and swirl gently with a knife or skewer.

Step 06

Bake for 40-45 minutes until center is set. Cover with foil after 25 minutes if peanut butter browns too quickly. Let cool completely before cutting.

Notes

  1. For the best texture, avoid overmixing the batter after adding the dry ingredients.

Required Equipment

  • 8x8 inch square baking pan
  • Parchment paper
  • Small saucepan
  • Mixing bowls
  • Whisk
  • Spatula
  • Knife or skewer

Allergen Information

Review each component for possible allergens and consult a health professional when concerned.
  • Contains peanuts
  • Contains eggs
  • Contains dairy
  • Contains wheat/gluten

Nutritional Information (per serving)

These figures serve as estimates and are not a substitute for medical advice.
  • Calories: 380
  • Fat: 22.3 g
  • Carbohydrates: 42.5 g
  • Protein: 5.8 g