Jump to Recipe

Our Peanut Butter Brownie Bars are brownies chock full of chocolate chips and peanut butter chips and topped with our Best Peanut Butter Buttercream Frosting.

Closeup of a Peanut Butter Brownie Bar sitting on a white platter surrounded by Peanut Butter Chips and Chocolate Chips.

These Peanut Butter Brownie Bars are super delicious but we cannot lie … they are very sweet and rich (but definitely in a GOOD way.)  Chocolate and peanut butter are two great tastes that taste great together so just cut these yummy frosted brownies up into smaller-sized bars and happily serve them up to your family and friends. These brownie bars are a great last-minute dessert.  We’ve served these at family birthday dinners, Thanksgiving and Christmas.  They never disappoint, and we hope your family enjoys them as much as ours does.

How to Make the Brownies

Closeup on a clear mixing bowl filled with Brownie Batter and Peanut Butter Chips.

Step 1: We like the Ghirardelli Double Chocolate Brownie Mix because of the rich dark chocolate taste and the extra chocolate chips in the batter but go ahead and use your favorite brand of brownie mix.  Make up the brownie batter according to the directions on the package and then add 1 cup of Reese’s Peanut Butter Chips! 

Closeup on a pan of brownies just out of the oven.

Step 2: Pour the Brownie batter into a 13″ x 9″ pan and bake according to the directions on the box. Allow the brownies to completely cool.

How to Make the Peanut Butter Frosting

Closeup on a white mixing bowl filled with homemade Peanut Butter Frosting and a white spatula.

Step 3: While the brownies are cooling, make a batch of our Best Peanut Butter Buttercream Frosting.  It is thick, peanut butter-y and so very yummy.  You can find the directions to make Best Peanut Butter Buttercream Frosting right here.

Decorating the Brownies

Closeup on a pan of baked brownies being frosted with The Best Peanut Butter Frosting.

Step 4:  Add a thick layer of the Peanut Butter Frosting to the brownies after they are cool.

Peanut Butter Brownie Bars on a white surface being drizzled with melted chocolate.

Step 5: If you want to make the Brownie Bars a little fancier … melt 1/2 cup of Semi-Sweet Chocolate Chips in a plastic bag in the microwave. Cut off a very tiny bit from the corner of the plastic bag and drizzle the melted chocolate over the top of the bars. Allow the drizzled chocolate to harden up before you store the brownies. These Brownie Bars are so yummy – chock full of both chocolate chips and peanut butter chips.

Closeup on a white serving platter filled with a batch of Peanut Butter Brownie Bars.

Other Brownie Recipes You Will Love

Peanut Butter Brownie BarsPrint

Peanut Butter Brownie Bars

Yield 24 brownies
Prep Time 10 minutes
Cook Time 20 minutes
Additional Time 10 minutes
Total Time 40 minutes

Our Peanut Butter Brownie Bars are brownies chock full of chocolate chips and peanut butter chips and topped with our Best Peanut Butter Buttercream Frosting.

Ingredients

  • 1 Family Sized Box of Ghirardelli Double Chocolate Brownie Mix
  • Eggs (Amount according to the back of the Brownie Mix)
  • Oil ( (Amount according to the back of the Brownie Mix)
  • 1 cup Reese's Peanut Butter Chips
  • 1/2 cup Semi-Sweet Chocolate Chips
  • 1 batch of our The Best Peanut Butter Buttercream Frosting

Instructions

  1. We like the Ghirardelli Double Chocolate Brownie Mix because of the rich dark chocolate taste and the extra chocolate chips in the batter but go ahead and use your favorite brand of brownie mix.  Make up the brownie batter according to the directions on the package and then add 1 cup of Reese's Peanut Butter Chips! 
  2. Pour the Brownie batter into a 13" x 9" pan and bake according to the directions on the box. Allow the brownies to completely cool.
  3. While the brownies are cooling, make a batch of our Best Peanut Butter Buttercream Frosting.  It is thick, peanut butter-y and so very yummy.  You can find the directions to make Best Peanut Butter Buttercream Frosting right here.
  4. Add a thick layer of the Peanut Butter Frosting to the brownies after they are cool.
  5. If you want to make the Brownie Bars a little fancier ... melt 1/2 cup of Semi-Sweet Chocolate Chips in a plastic bag in the microwave. Cut off a very tiny bit from the corner of the plastic bag and drizzle the melted chocolate over the top of the bars. Allow the drizzled chocolate to harden up before you store the brownies. These Brownie Bars are so yummy - chock full of both chocolate chips and peanut butter chips.

Did you Make this Recipe? Leave a review below, then snap a picture and tag @twosisterscrafting on Instagram so we can see it!

© Two Sisters Crafting
Cuisine: American / Category: Brownies and Bars