Peanut Butter Cup Brownies

Published Date: May 30, 2023

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Peanut Butter Cup brownies on a white plate.

Peanut Butter Cup Brownies are a rich, decadent homemade treat that’s loaded with Reese’s Peanut Butter Cups and Reese’s Peanut Butter Chips! Bake up a fudgy batch in just 27 minutes or less!

Peanut butter cup brownies on a white plate.

These Homemade Peanut Butter Cup Brownies are a treat you aren’t going to want to miss! The fudgy brownie base is stuffed with peanut butter chips and mini peanut butter cups, making for a scrumptious dessert!

Though these brownies are filled with absolute peanut butter perfection, you’ll be pleased to know they’re quick and easy to make! Aside from the peanut butter chips and peanut butter cups, you likely have everything already on hand to make them.

Cook up this One-Pot Creamy Tomato Pasta for dinner on the stovetop while these babies bake in the oven, and in just 30 minutes, you’ll have both dessert and dinner done!

Enjoying A Peanut Butter Cup Brownie

Taste: One of dessert’s favorite flavor combinations combines deliciously in these brownies, sweet chocolate and salty peanut butter! Each bite is filled with a chocolate brownie that’s loaded with irresistible peanut butter goodness!

Texture: These homemade peanut butter cup brownies are a fudgy dream come true! Every slice delivers a chewy, fudgy texture that will have you going back for a second (or even third) slice!

Peanut Butter Cup Brownies sliced.

Ingredients For Peanut Butter Cup Brownies

  • Unsalted Butter
  • Unsweetened Cocoa Powder
  • Granulated Sugar
  • Large Eggs
  • Pure Vanilla Extract
  • Salt
  • All-Purpose Flour
  • Baking Powder
  • Reese’s Peanut Butter Cup Minis
  • Reese’s Peanut Butter Chips

Skipping over a box mix brownie mix is easy when this Homemade Brownie Recipe is made up of mostly pantry staple ingredients! And once you taste these homemade peanut butter chocolate brownies, you’ll never go back to the box mix version anyway!

Bringing the peanut butter flavor to these brownies are Reese’s Peanut Butter Cup minis and Reese’s Peanut Butter Chips. The mini cups should be in the candy aisle of your local grocery store, and you’ll find the peanut butter chips in the baking aisle.

Overhead photo of ingredients to make peanut butter cup brownies prepped on a white table.

How To Make Peanut Butter Brownies Recipe Step By Step

Step 1: Melt the butter and then allow it to cool before combining it with the other ingredients.

Step 2: Whisk in the granulated sugar and unsweetened cocoa powder once the melted butter has cooled.

Melted butter in a glass bowl.
Melted butter, sugar, and cocoa powder in a glass bowl.

Step 3: Mix in the eggs, vanilla extract, and salt only until the eggs have been fully incorporated into the chocolate mixture.

Step 4: Stir in the flour and baking powder gradually.

Two eggs added to a bowl to make brownie batter.
Flour being added to a bowl to make brownie batter.

Step 5: Fold in a portion of Reese’s Peanut Butter Cup minis and peanut butter chips.

Step 6: Pour the brownie batter into the prepared baking pan. Spread the remaining Reese’s Peanut Butter Cup minis and peanut butter chips on top of the batter.

Mini reese's cups and peanut butter chips being mixed into a bowl of brownie batter.
A square pan of peanut butter brownie batter.

Step 7: Bake until a toothpick inserted into the center of the brownies comes out mostly clean. Afterward, allow the brownies to cool completely in the pan on a wire rack, and then slice and serve!

Peanut Butter Cup brownies on a white plate.

How To Store Peanut Butter Cup Brownies

Store these Peanut Butter Brownies in an airtight container on the counter or in the refrigerator. Enjoy the leftover brownies for up to 3 days!

How To Freeze Chocolate Peanut Butter Brownies

These brownies are a wonderful make-ahead, and freeze treat to enjoy later! To freeze, first, slice the completely cooled brownies into squares.

Afterward, stack them in a freezer-safe airtight container or bag with parchment paper between each slice. This will prevent them from sticking together when thawing and allow you to carefully remove them to enjoy one at a time if you’d like.

Once they’re in the bag or container, store them in the freezer for up to 3 months.

Peanut Butter Cup Brownies Substitutions And Variations

  • Butter – If you have salted butter on hand, you can use that instead of unsalted butter. To make the swap, you’ll need to reduce the salt by ¼ teaspoon.
  • Peanut Butter Cups – Regular-sized peanut butter cups can be chopped up to use in this brownie recipe if you can’t get your hands on minis.
  • Chocolate Chips – For more chocolate flavor in these brownies, you can reduce the amount of peanut butter chips and add in semi-sweet chocolate chips!
  • Other Candy Choices – Another peanut butter candy or bar of your choice can replace the peanut butter cups if you’d like. Reese’s Pieces would be a fun variation to try!
  • Brownie Bites – Pour the batter into a mini muffin tin for peanut butter brownie bites! Then watch carefully as they bake since they won’t require 27 minutes of baking time, probably closer to 12 to 15.
  • Brownie Sundaes – Take these brownies over the top and turn them into a peanut butter cup brownie sundae! Warm one up in the microwave, and then top it with vanilla ice cream, whipped cream, more peanut butter chips or cups, and a cherry!
A white plate filled with peanut butter cup brownies, the top one is missing a bite.

Peanut Butter Cup Brownies FAQs

Can A Mixed Chocolate Milk Powder Be Used In Place Of Cocoa Powder?

No, mixed chocolate milk powder is filled with sugar, so that would alter the result of the recipe significantly. Instead, unsweetened cocoa powder such as Hershey’s must be used.

How Come My Homemade Brownies Came Out Tough?

If these brownies turned out tough, the batter may likely have gotten over-mixed. To prevent this, only mix the brownie ingredients together until they’re just incorporated.

Another possibility is that the brownies were baked for too long! These brownies should be pulled from the oven once a toothpick inserted into the enter comes out mostly clean with minimal streaks of batter on it.

What’s The Best Way To Cut Brownies?

To neatly cut brownies, first, allow them to cool for at least 2 hours at room temperature. This will allow them to firm up a bit, making it easier to slice into them.

Second, I find that a plastic knife works best for clean and neat cutting. Wipe the plastic knife with a paper towel if needed as you go! These reusable plastic knives work great for cutting brownies! (affiliate link)

Can I Reheat A Brownie To Enjoy It Warm?

Of course! Nothing beats a warm slice of peanut butter chocolate brownie with an ice-cold glass of milk! To reheat a slice, place your brownie on a microwave-safe plate, paper towel, or paper plate.

Then pop it in the microwave for 20 to 30 seconds or until warm.

Peanut butter cup brownies on a white plate.

Peanut Butter Cup Brownies

These brownies are fudgy and peanut butter perfection. It’s rich, decadent, and loaded with Reese’s peanut butter cups and Reese’s peanut butter chips.
5 from 1 vote
Print Pin Rate
Course: Dessert
Cuisine: American
Keyword: peanut butter brownies, reese’s brownies
Prep Time: 10 minutes
Cook Time: 27 minutes
Total Time: 37 minutes
Servings: 9 people
Calories: 407kcal


  • 8×8-inch baking pan
  • parchment paper
  • Mixing bowls
  • Hand mixer or whisk


  • ½ cup unsalted butter melted and cooled
  • ¾ cup granulated sugar
  • ½ cup unsweetened cocoa powder
  • 2 large eggs
  • teaspoons pure vanilla extract
  • ¾ teaspoon salt
  • cups all-purpose flour
  • ¼ teaspoon baking powder
  • 1 cup Reese’s peanut butter cup minis roughly chopped and divided
  • ¾ cup Reese’s peanut butter chips divided


  • Preheat the oven to 350°F and lightly grease the bottom of an 8×8-inch baking pan and line it with parchment paper. You can ball the parchment paper up and run it under water for a few seconds to soften it up and make it easier to work with. Just pat it dry with a paper towel before putting it in the pan. Set it aside.
  • In a large microwave-safe bowl, melt the ½ cup unsalted butter and allow it to cool for 5 minutes before adding the other ingredients.
  • Once the butter is cooled, whisk in ¾ cup granulated sugar and ½ cup unsweetened cocoa powder.
  • Add in the 2 large eggs, 1½ teaspoons pure vanilla extract, and ¾ teaspoon salt just until the eggs have been fully incorporated into the batter.
  • Mix in the 1¼ cups all-purpose flour and ¼ teaspoon baking powder until well combined, but try not to overmix.
  • Fold in ¾ cup of the 1 cup Reese’s peanut butter cup minis and ½ cup of the ¾ cup Reese’s peanut butter chips. Reserve the rest for topping.
  • Spread the brownie batter into the prepared baking pan in an even layer.
  • Add the remaining Reese’s peanut butter cup minis and chips for topping, gently pressing them into the batter.
  • Bake for 22 to 26 minutes, or until a toothpick inserted in the center comes out with just a little bit of crumbs.
  • We recommend letting the brownies cool in the pan on a wire rack completely before cutting them into squares and serving. Cutting with a plastic knife will help ensure clean cuts.


Calories: 407kcal | Carbohydrates: 50g | Protein: 7g | Fat: 22g | Saturated Fat: 11g | Polyunsaturated Fat: 2g | Monounsaturated Fat: 7g | Trans Fat: 0.4g | Cholesterol: 65mg | Sodium: 335mg | Potassium: 217mg | Fiber: 3g | Sugar: 32g | Vitamin A: 386IU | Vitamin C: 0.1mg | Calcium: 49mg | Iron: 2mg

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Gabby Hubbell Family Busy Family Recipes Author

From one busy family to another, I see you.

Hi, I’m Gabby! From crockpots to one-pot recipes, we’re eager to make dinner time a breeze for you and your family. Follow along for recipes even the pickiest of eaters will enjoy time and time again!
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