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Dense Fudgy brownie cupcakes are filled with peanut butter sweetened with caramel syrup.
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5 from 6 votes

Easy Peanut Butter Brownie Cups Recipe

A brownie version of Reese's Peanut Butter cups. Start with a fudgy brownie base then add creamy and rich peanut butter filling topped with shaved milk chocolate and sprinkled with flaky sea salt.
Prep Time10 mins
Cook Time40 mins
Total Time50 mins
Course: Dessert, Snacks, Treats
Cuisine: American
Servings: 12 brownie cups
Calories: 341kcal



  • Preheat the oven to the instructed temperature on the back of the brownie mix box. Spray a muffin pan really well with vegetable cooking spray and set aside.
  • Follow the instructions on the brownie box to create the batter plus the vanilla extract. Then fold the peanut butter mini cups into the batter. Make sure it is well combined.
  • Evenly fill each muffin cup about ¾ of the way full with the batter.
  • Bake in the oven for the required time listed on the box, about 25-30 minutes, or until you see cracks on the top of the brownies. You can also check with a toothpick - if it comes out clean the brownies are ready.
  • After the brownies have finished baking and are still warm, use the back of a spoon to make an indentation for the peanut butter.
  • In a small microwaveable bowl, melt and mix the peanut butter with the caramel syrup heating in 30 second increments.
  • Remove the brownies from the muffin pan and transfer them to a cooling rack.
  • While the brownies are still warm, top each one with the warm peanut butter and caramel sauce. Cool completely.
  • Once the top is cooled, garnish with a sprinkle of sea salt and chocolate shavings made from the milk chocolate bar.
  • Best served immediately and warmed. Especially delicious with a cold glass of milk.


  • Don't be afraid to sprinkle the flaky sea salt to the top of the brownie cup. The salt enhances the chocolate flavor and balances the sweetness from the brownie. 
  • These peanut butter brownies are delicious warmed. Put them in the microwave for 20-30 seconds or until warm. 
  • If you prefer a little less chocolate, try using a blondie brownie mix instead. The peanut butter will be delicious with the chewy vanilla beauties.
  • Instead of the Reese's pieces, try peanut butter chips for a one-two punch of peanut butter flavor.
  • If you want little bites, make them as mini brownies in the mini muffin tins. These make delicious treats any time of year and in a mini size they'll go farther.


    Calories: 341kcal | Carbohydrates: 47g | Protein: 6g | Fat: 15g | Saturated Fat: 4g | Trans Fat: 1g | Cholesterol: 1mg | Sodium: 428mg | Potassium: 119mg | Fiber: 1g | Sugar: 30g | Vitamin A: 14IU | Vitamin C: 1mg | Calcium: 21mg | Iron: 2mg