Recipe for Reese’s Peanut Butter Brownies: Fudgy Base With Swirled Surprise

Rich chocolate meets creamy peanut butter in this decadent dessert that combines a fudgy brownie base with a swirled surprise. The secret lies in layering Reese’s pieces between the batter for pockets of gooey goodness.

This vegetarian-friendly treat bakes in 30 minutes, yielding a dense, moist texture with perfect peanut butter-chocolate balance. Every bite delivers the classic flavor combination you love.

Ingredients for Recipe for Reese’s Peanut Butter Brownies

Rich cocoa and peanut butter swirl together in this indulgent dessert with Reese’s surprises.

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The chocolate base needs quality cocoa. Hershey’s Special Dark gives that deep, fudgy flavor we’re after. Butter should be real unsalted—margarine changes the texture. For the peanut butter, Jif or Skippy creamy work perfectly (the natural, oily kind can separate). Grab full-size Reese’s cups from the candy aisle, not the mini ones—they hold their shape better during baking.

No Dutch-process cocoa? Regular unsweetened works fine—just don’t use hot cocoa mix. Out of Reese’s Pieces? Chopped Reese’s cups can go in the batter instead (though they melt more). Want extra peanut flavor? Add 1/4 cup chopped peanuts. The eggs must be at room temp—just set them in warm water for 5 minutes if you forgot to take them out earlier.

Brownies keep 5 days in an airtight container at room temp. They freeze beautifully for 3 months—slice before freezing for easy portions. Dust with powdered sugar just before serving (it dissolves if done too early).

Step-by-Step Instructions for Reese’s Peanut Butter Brownies

Here’s the method I use to create that perfect fudgy base with a swirled surprise in every bite.

Step 1: Prepare the Brownie Base

Preheat your oven to 350°F and line a 9×13-inch baking pan with parchment paper. In a large bowl, whisk together the 1 cup Unsalted Butter (melted and cooled) and 1.5 cups Granulated Sugar until smooth and glossy.

Add the 4 whole Large Eggs one at a time, mixing well after each addition. Stir in the 2 tsp Vanilla Extract. Here’s the thing—this step ensures a rich, crackly top that’s signature to great brownies.

Step 2: Incorporate Dry Ingredients

In a separate bowl, sift together the 0.75 cup All-Purpose Flour, 0.5 cup Unsweetened Cocoa Powder, 0.5 tsp Baking Powder, and 0.5 tsp Salt. Gradually fold this into the wet mixture until just combined. Don’t overmix—this keeps the brownies tender.

The batter will be thick and glossy. I always scrape the sides of the bowl to make sure every bit of flour is incorporated. You’ll notice the color deepen as the cocoa powder blends in fully.

Step 3: Add Peanut Butter and Candy

Warm the 0.75 cup Creamy Peanut Butter slightly to soften it, then drop spoonfuls evenly over the brownie batter. Use a knife to gently swirl it in—just a few strokes so you get ribbons of peanut butter throughout.

Fold in the chopped 10 pieces Reese’s Peanut Butter Cups and 0.75 cup Reese’s Pieces, reserving a handful of each to sprinkle on top. This ensures pockets of melty, gooey surprises in every bite.

Step 4: Bake and Finish

Spread the batter evenly in the prepared pan and sprinkle the reserved candy on top. Bake for 25-30 minutes until the edges are set but the center is still slightly soft—a toothpick should come out with a few moist crumbs.

Let the brownies cool completely in the pan before slicing. This is non-negotiable; cutting too soon will make them crumbly. For the final touch, dust with 0.25 cup Powdered Sugar if desired.

Dietary Considerations for This recipe for reeses peanut butter brownies

Keto-Friendly Options

For a keto version, swap out traditional sugar for erythritol or monk fruit sweetener and use almond flour instead of all-purpose flour. Replace chocolate chips with sugar-free dark chocolate (at least 85% cocoa) and ensure your peanut butter is unsweetened and low-carb. This keeps the rich flavor while staying within macros.

Gluten-Free Modifications

To make these brownies gluten-free, use a 1:1 gluten-free baking flour blend in place of regular flour. Check that all other ingredients, like peanut butter and chocolate, are certified gluten-free to avoid cross-contamination. The texture remains fudgy and delicious!

Allergen Information

This recipe contains peanuts, dairy, eggs, and gluten (unless modified). For nut-free versions, use sunflower seed butter instead of peanut butter. For dairy-free, opt for dairy-free chocolate chips and a plant-based butter substitute. Always verify ingredient labels for hidden allergens.

Vegetarian Adjustments

These brownies are naturally vegetarian as written. For a vegan twist, replace eggs with flax or chia eggs (1 tbsp ground flax/chia + 3 tbsp water per egg) and use vegan chocolate and butter. The result is just as decadent!

Low-Sodium Options

To reduce sodium, use unsalted butter and omit any added salt in the recipe. Choose low-sodium peanut butter and ensure other ingredients, like baking powder, are sodium-free. This small tweak makes the treat friendlier for those watching their salt intake.