Reese’s Stuffed Brownies Recipe: Gooey Chocolate Peanut Butter Squares

Reese’s Stuffed Brownies are an irresistible chocolate treat made with a fudgy brownie base and a Reese’s Peanut Butter Cup hidden inside each bite. Rich, gooey, and packed with the classic chocolate-and-peanut-butter pairing, these brownies are simple to make and perfect for sharing or indulging at home.

Reese's stuffed brownies on a wire rack.

This recipe comes together quickly — about 35 minutes total — making it ideal for easy desserts, last-minute gatherings, or holiday baking. The surprise peanut butter cup in the center adds a fun twist that guests love. Once you try them, you’ll see why these are a favorite for parties and cozy nights in.

Beautiful and mouthwatering, these stuffed brownies deliver a perfect balance of chocolate and peanut butter. Make a batch and keep extras stored properly so you can enjoy them all week.

Why You’ll Love These Stuffed Brownie Cups

  • A hidden Reese’s Peanut Butter Cup in every brownie
  • Luscious chocolate combined with creamy peanut butter
  • Uses common pantry ingredients you likely already have
  • Ready in about 35 minutes from start to finish
  • Great for holidays, school events, parties, or a simple treat
Reese's brownie cups on a wire rack.

Ingredients Needed

  • Salted butter
  • Creamy peanut butter
  • Unsweetened baking chocolate
  • Granulated sugar
  • Vanilla extract
  • Eggs
  • All-purpose flour
  • Reese’s Peanut Butter Cups

How to Make Reese’s Stuffed Brownies

  • Step One: Preheat the oven to 350°F. Spray a muffin tin with cooking spray.
  • Step Two: In a small saucepan over low heat, combine the baking chocolate, peanut butter, and butter. Stir constantly until melted and smooth. Remove from heat and let cool for about 5 minutes.
  • Step Three: In a large bowl, combine the sugar, eggs, and vanilla. Beat on high for 2–3 minutes until well combined and slightly aerated. Add the chocolate mixture and beat on low until incorporated. Fold in the flour on low speed until just combined.
  • Step Four: Spoon about 1 tablespoon of batter into each muffin cup. Place one Reese’s Peanut Butter Cup on top of the batter and press gently to embed it. Add about 1 teaspoon of batter to fully cover each peanut butter cup and smooth the top.
  • Step Five: Bake for 20 minutes. Allow the brownies to cool in the pan before transferring them to a wire rack to finish cooling.
A stack of Reese's stuffed brownies.

Equipment Needed

  • Measuring cups and spoons
  • Muffin pan
  • Mixing bowl
  • Mixer or hand whisk

What To Serve With Brownies Stuffed with Reese’s

  • Chocolate and peanut butter no-bake cookies
  • Peanut butter hot chocolate or a milkshake
  • Chocolate peanut butter cupcakes
  • A scoop of vanilla ice cream for an extra treat
Reese's stuffed brownies cut in half on a plate.

Helpful Tips and Tricks

  • Watch the temperature when you bite into a freshly baked brownie — the melted center can be very hot.
  • Avoid overmixing the batter to keep the brownies tender rather than dense.
  • If using a toothpick to test doneness, realize the melted Reese’s in the center can make the toothpick appear dirty even when the brownies are cooked through. Use the edges as a guide and a light jiggle; they should be set but slightly soft in the center.

Recipe Variations and Substitutions

  • If you prefer convenience, a high-quality boxed brownie mix can be used in place of the from-scratch batter.
  • For extra peanut butter flavor, drizzle slightly cooled brownies with melted peanut butter and sprinkle chopped Reese’s Pieces or chopped candies on top.
  • Use full-size or mini Reese’s Cups depending on how much peanut butter center you want.

Leftover Storage

Store cooled brownies in an airtight container at room temperature for up to a week. Avoid refrigeration, which can dry them out and change the texture.

Can I Freeze This?

Yes. Once fully cooled, place brownies in a freezer-safe container or bag and freeze for 2–3 months. Thaw at room temperature or enjoy slightly chilled straight from the freezer for a different texture.

A hand holding a Reese's stuffed brownies cut in half.

What Other Things Can I Stuff Brownies With?

You can stuff brownies with many different candies and treats. Try chopped candy bars, mini cookies, chocolate kisses, or chopped nuts. Popular options include:

  • Milky Way
  • Snickers
  • Almond Joy
  • M&M’s or chopped nuts
  • Hershey’s Kiss
  • KitKat pieces

What Makes Fudgy Brownies?

Fudgy brownies rely on a higher fat-to-flour ratio and less aeration than cakey brownies. Melting the chocolate and using more butter and chocolate relative to flour helps create that dense, rich texture.

More Brownie Recipes

If you enjoy these Reese’s Stuffed Brownies, try other variations like Snickers Brownies, marshmallow-topped brownies, banana-split brownies, or salted caramel brownies for new flavor combinations.

Tip: If you make this recipe, store any extras properly and share your results with friends and family — these are best enjoyed fresh or slightly warmed.