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Peanut Butter Cup Brownies

Peanut Butter Cup Brownies are fudgy and delicious, filled with miniature Reese’s Peanut Butter Cups for a decadent treat.

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I am a huge fan of peanut butter cups and everyone goes crazy for Peanut Butter Cup CookiesNo Bake Peanut Butter Cheesecake and Peanut Butter Cup Fudge. These brownies are guaranteed to please if find the chocolate and peanut butter combo as irresistible as I do!

peanut butter cup brownies sliced and stacked on parchment paper

Peanut Butter Cup Brownies ~ Doctored Brownie Mix

Everyone needs a short cut recipe every now and again and as much as I love my homemade Walnut Brownies, I always have brownie mixes on hand. I had a some miniature peanut butter cups on hand and thought they made the very best addition to fudgy brownies!

Ingredients Needed:

Ingredients for peanut butter cup brownies

  • Triple Chocolate Brownie Mix ~ I’m using Hershey’s that I order from Sam’s Club, they come 4 to a box and I’m using one mix for this recipe. Use your favorite.
  • Eggs ~ Room temperature eggs are best for baking.
  • Butter ~ I use softened salted butter, oil is what the box calls for. Either will work.
  • Water ~ I also like to use leftover coffee in place of the water.
  • Reese’s Peanut Butter Cups ~ Any size will work, I sliced the miniatures in half.

How to Make Peanut Butter Cup Brownies:

brownie mix, butter, eggs, water in a mixer bowl

  • Add brownie mix to a mixer bowl with butter, water and eggs.

brownie batter with a spatula in a mixer bowl

  • Beat about 2 minutes, scraping down the sides about half way through until well combined.

brownie batter spread into a parchment lined baking dish

  • Line a baking dish 8 x 8 or 8 x 11 inches with parchment paper or spray with non stick cooking spray.
  • Pour brownie batter into dish and spread brownie batter evenly.

MIni Reese's Peanut Butter Cups

  • Unwrap peanut butter cups and slice in half.

brownie batter with peanut butter cups

  • Press peanut butter cups down into the brownie batter, leaving the tops showing.
  • Bake brownies for 40 minutes, turning the pan half way through baking.

brownies topped with peanut butter cups, cut in half

  • Remove from oven to a wire rack to cool for about 30 minutes.

sliced brownies on parchment paper

  • Gently remove the parchment paper and place onto a wire rack to cool completely before slicing.

How to Store Brownies:

sliced brownies in a parchment lined dish

Store cooled brownies in an air tight container for up to 4 days. Brownies will stay fresher if they are uncut.

Freeze brownies in a vacuum sealed bag or 2 layers of plastic wrap and a layer of foil for up to 3 months. Be sure to label with contents and the date.

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sliced brownies on parchment paper

More Delicious Brownie Desserts to Try:

Brownie Pudding Pie is one of my most requested recipes. It’s a layer of fudgy brownies topped with chocolate pudding and whipped cream. It’s incredibly rich and delicious for serious chocolate cravings.

Chocolate Glazed Brownies are reminiscent of the lunch room brownies we all loved as kids. A super simple recipe with the best chocolate glaze. Dress them up with festive sprinkles for the holidays!

Dr Pepper Brownies are so easy to make from scratch. A quick and easy recipe using pantry ingredients for a special treat.

sliced peanut butter cup brownies - 3 stacked on parchment paper

These Peanut Butter Cup Brownies are quick and easy to make, just perfect for every occasion. Delicious enough for holidays and celebrations and simple to make any day of the week.


Yield: 12 brownies

Peanut Butter Cup Brownies

Peanut Butter Cup Brownies stacked

Peanut Butter Cup Brownies are fudgy and delicious, filled with miniature Reese's Peanut Butter Cups for a decadent treat. 

Prep Time 10 minutes
Cook Time 40 minutes
Additional Time 1 hour
Total Time 1 hour 50 minutes


  • 20 ounce Triple Chocolate Brownie Mix
  • 1/2 cup salted butter, softened
  • 2 eggs, room temperature
  • 1/4 cup water
  • 18 Reese's Peanut Butter Cup Miniatures


  1. Preheat oven to 325°.
  2. Add brownie mix with butter, eggs and water to a mixer bowl. Beat with an electric mixer about 2 minutes at medium speed. Stop half way through to scrape down the sides if needed.
  3. Line a 8 x 8 or 11 x 13 baking dish with parchment paper or spray with non stick baking spray.
  4. Pour batter into prepared pan and smooth evenly.
  5. Unwrap peanut butter cups and chop in half.
  6. Press down into brownie batter, leaving the top showing.
  7. Bake for 40 minutes, turning half way through baking time.
  8. Remove from oven to a wire rack to cool about 30 minutes.
  9. Remove parchment from baking dish and continue to cool on a wire rack. Cool completely before slicing.


Store cooled brownies in an air tight container at room temperature up to 4 days. Uncut brownies will stay fresher.

To freeze brownies: Wrap in 2 layers of plastic wrap and a layer of foil or vacuum seal. Freeze up to 3 months. Label with contents and date.

Nutrition Information:



Serving Size:


Amount Per Serving: Calories: 363Total Fat: 26gSaturated Fat: 11gTrans Fat: 0gUnsaturated Fat: 12gCholesterol: 87mgSodium: 244mgCarbohydrates: 32gFiber: 0gSugar: 6gProtein: 5g

Nutritional calculations are estimated and may not be accurate.

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