Peanut Butter Frosted Brownies

a batch of brownies with peanut butter frosting, cut into squares

Peanut Butter Frosted Brownies ~ these chewy chocolate brownies are topped with a veritable avalanche of creamy peanut butter frosting. Don’t even bother trying to resist.

a peanut butter frosted brownie with a fork stuck in it!

Every now and again I need to ground my light bright summer menu plan with a good old fashioned indulgent treat, and what better than chewy chocolate brownies smothered in whipped peanut-buttery frosting to bring us back down to earth after a steady diet of fresh fruits and veggies?

a batch of peanut butter frosted brownies cut into squares

The proportions here are key, so pay attention: the brownies are really just a vehicle for the insanely addictive frosting, so be generous. The recipe makes enough to slather on a nice thick layer, with a little extra for tasting…of course!

peanut butter frosted brownies with a glass of milk

a batch of peanut butter frosted brownies

These are the Goldilocks of brownies, neither too cakey nor too fudgey ~ they’re just right. If you like yours with some structure, go for the edges and corners, but save the soft center square for me!

kitchen tool spotlight: KITCHENAID MIXER WIRE WHISK 

I use my wire whisk attachment almost exclusively these days when I’m mixing up batters, creaming butters etc, and making frostings, it does a better and more even job than my paddle attachment. It does a great job whipping this peanut butter frosting to a perfect creamy consistency.


*recipe adapted from The Stay at Home Chef

a batch of brownies with peanut butter frosting, cut into squares
3.4 from 127 votes

Peanut Butter Frosted Brownies

Peanut Butter Frosted Brownies ~ these chewy chocolate brownies are topped with a veritable avalanche of creamy peanut butter frosting.  Don't bother trying to resist.
Course Dessert
Cuisine American
Total Time 45 minutes
Yield 12 servings
Calories 215kcal
Author Sue Moran


  • 1 1/2 sticks 12 Tbsp unsalted butter
  • ½ cup dark chocolate chips
  • ½ cup cocoa powder
  • ¾ cup sugar
  • ¾ cup packed brown sugar
  • 2 large eggs
  • 1 teaspoon vanilla extract
  • ½ teaspoon salt
  • 1 cup all purpose flour


  • 1 cup creamy peanut butter I use Jiff
  • 5 Tbsp unsalted butter at room temperature
  • 1 tsp vanilla extract
  • 5 Tbsp heavy cream possibly a bit more
  • 2 1/2 cups sifted confectioner's sugar possibly a bit more


  • Preheat oven to 350F. Line a 9x9 baking pan with parchment paper with long ends so you can lift the brownies out for easier frosting.
  • Melt the butter in a medium saucepan over medium low heat, and then add the chocolate chips, stirring constantly until they melt too.
  • Remove the pan from the heat and whisk in the cocoa powder and sugars and blend well. Whisk in the eggs, one at a time, then the vanilla and salt.
  • Fold in the flour and then spread evenly in the pan. Bake for 30-35 minutes. The top should look set and a toothpick inserted in the center should come out without wet batter clinging to it (fudgey crumbs are ok) Try not to over bake.
  • Cool the brownies completely before frosting.
  • To make the frosting, beat the butter and peanut butter together until fluffy and well combined. Beat in the vanilla and cream, then add the sugar, a cup at a time, and beat until smooth and creamy. If the frosting seems too thin, add a little more sugar, and if the frosting seems too stiff, add a little more cream. Spread generously over the cooled brownies.


Calories: 215kcal
The nutritional information for recipes on this site is provided as a courtesy and although tries to provide accurate nutritional information, these figures are only estimates.

Make these peanut butter frosted brownies your own ~

  • Make it chocolatier ~ add chocolate chips to the brownie batter.


Thanks for pinning!

Fork in a frosted brownie.



If you love the combination of peanut butter and chocolate in these peanut butter frosted brownies, you’ll surely want to check out some other nut butter and chocolate recipes from the blog ~

Tiger Butter has to be one of the prettiest desserts ever, with its swirls of chocolate and nut butter. The classic is made with peanut butter, but I used cashew butter in this variation.

Cashew Tiger Butter is a luscious swirled chocolate bark that everyone loves! ~



Outrageous Almond Butter Skillet Blondies ~  what nut butter does to a blondie is truly outrageous…from the minute these came out of the oven I knew they were going to be trouble.

almond butter skillet blondies in a cast iron skillet with melting ice cream



Peanut Butter Pie Bars ~ these no bake bars are great straight from the fridge or freezer!

No Bake Peanut Butter Pie Bars

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    Leave a Reply

    Please rate this recipe!

  • Reply
    Susan Ong
    August 27, 2021 at 8:23 am

    How long does the frosting last in room temperature?

  • Reply
    Cyndee Hinrichs
    April 21, 2019 at 11:50 pm

    Made these brownies over the Easter weekend, absolutely divine ! Bake them for 25 minutes, l prefer the fudge level when they’re slightly underdone. After frosting, l chilled them and then sliced them into portions. Then let them sit at room temp. They look so beautiful, my guests thought the frosting was a mousse! Served with vanilla ice cream chocolate sauce. I have photos, not sure where to post them. Thank you for another hit for my parade.

  • Reply
    Janet Wager
    August 3, 2018 at 7:31 pm

    I just today made these Peanut Butter Brownies!! They turned out wonderful! Fudgy Brownie was a great consistency and the frosting was wonderful but the appearance wasn’t quite like pictured here, but the appearance didn’t distract from the great taste. I still took them
    to my neighbors and they were thrilled!!!

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