Our chocolate Peanut Butter Brownies are the ultimate treat for chocolate and peanut butter lovers! We're talking rich, chewy, and covered in a creamy peanut butter frosting, then chocolate glaze, and Reese’s peanut butter cups in every bite.
One-Two punch Chocolate Peanut Butter Brownies
One-Two punch Chocolate Peanut Butter BrowniesI'm sure we can all agree the chocolate and peanut butter combo in this Peanut Butter Brownies recipe is absolutely unbeatable. They're like a homemade Reese’s in brownie form, and always a huge hit whenever I make them.
I actually prefer to make these brownies a day in advance, because I think they taste even better after they've had time to chill and set in the fridge.
Check out my other brownie and “bar” recipes, like Oatmeal Cookie Bars, Lemon Brownies, Peanut Butter Bars, and Scotcheroos!
How to make Peanut Butter Brownies:
Make Brownies: Combine granulated sugar, brown sugar, and melted butter until smooth, then mix in the eggs, egg yolk, milk, and vanilla. In a separate bowl, whisk together the dry ingredients and add them to the wet mixture, stirring just until combined. Spread the thick batter into a greased 9×13-inch pan and bake at 350°F for 35–45 minutes, or until a toothpick inserted in the center comes out clean. Let the brownies cool completely.
Peanut Butter Frosting: Beat together butter and peanut butter until creamy, then mix in powdered sugar, vanilla, and a splash of milk until light and fluffy. Spread evenly over the cooled brownies and refrigerate.
Add Melted Chocolate: Melt chocolate chips and butter in the microwave until smooth, let cool slightly, then pour over the peanut butter frosting. Top chocolate and peanut butter brownies with chopped Reese’s and chill until the chocolate sets.
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Recipe
Peanut Butter Brownies
Equipment
- Hand mixer , or
Ingredients
Brownies:
- 1 1/2 cups granulated sugar
- 1 1/2 cups light brown sugar , packed
- 1 cup salted butter , melted
- 4 large eggs
- 1 large egg yolk
- 1/3 cup milk
- 2 teaspoons vanilla extract
- 2 1/4 cups all-purpose flour
- 1 cup unsweetened cocoa powder
- 1/2 teaspoon baking powder
- dash salt
Peanut Butter Frosting:
- 1/4 cup butter , room temperature
- 3/4 cup creamy peanut butter
- 1 cup powdered sugar
- 1 teaspoon vanilla extract
- 1-3 Tablespoons milk , as needed
Chocolate Glaze:
- 1 cup semi-sweet chocolate chips
- 5 Tablespoons butter
- 1 small bag mini Reese's chocolates , unwrapped and chopped
Instructions
- Preheat oven to 350 degrees F.
- Brownies: In a mixing bowl add granulated and brown sugars and melted butter. Beat until well combined. Add eggs and egg yolk, beating after each addition. Add milk and vanilla extract.1 ½ cups granulated sugar, 1 ½ cups light brown sugar, 1 cup salted butter, 4 large eggs, 1 large egg yolk, ⅓ cup milk, 2 teaspoons vanilla extract
- In a separate bowl mix together the flour, cocoa powder, baking powder, and salt. Add dry ingredients to wet ingredients and mix just until combined. The batter will be thick.2 ¼ cups all-purpose flour, 1 cup unsweetened cocoa powder, ½ teaspoon baking powder, dash salt
- Bake: Pour batter into a greased 9×13'' baking pan and spread into an even layer. Bake at 350 degrees for 35-45 minutes or until a toothpick inserted in the center comes out clean. Allow to cool completely.
- Peanut Butter Frosting: Beat together butter, and peanut butter until smooth. Add powdered sugar and vanilla and beat again until smooth. Add a little splash of milk, beating well until light and fluffy. Add more milk or powdered sugar if needed to make the frosting thicker or thinner. Smooth frosting over the top of cooled brownies. Refrigerate while you make the chocolate topping.¼ cup butter, ¾ cup creamy peanut butter, 1 cup powdered sugar, 1 teaspoon vanilla extract, 1-3 Tablespoons milk
- Chocolate Glaze: Place chocolate chips and butter in a microwave safe bowl. Microwave in 30 second intervals, stirring in between, until just melted and smooth. Allow to cool for 3-4 minutes.1 cup semi-sweet chocolate chips, 5 Tablespoons butter
- Spread evenly over the frosted brownies. Add chopped Reese's peanut butter cups on top. Return to fridge to allow the chocolate to set.1 small bag mini Reese's chocolates
Notes
Nutrition
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I originally shared this recipe July 2016. Updated September 2020 and October 2025.
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How can I turn this recipe into one for an 8×8 or 9×9 pan? It sounds sinfully delicious!
Yes, cut the recipe in half. Enjoy!
Pretty tasty and super rich! I could give these another try.
Amazing! My worked loved every bite of the brownies! Easy recipe to follow and make.
These are very gooood.lol
Made these twice now to rave reviews and recipe requests. They. Are. Amazing!
If you are looking for a recipe that is delicious and will wow your guest, this is it.
Today I was in a really big hurry so I’ll be honest I used a boxed brownie mix with the peanut butter topping and chocolate glaze as noted in this recipe and it was a huge hit. Just be sure to get a really good brownie mix that’s chocolatey and fudgy
what is the serving size for this recipe?
One brownie.
What is the amount per serving?
One brownie.
Hi. For frosting and glaze do we use salted butter or unsalted? Thank you.
Hi Nana,
Either will work fine!
Hi there
I don’t suppose you have the recipe conversion in grams (sorry UK) I have checked the conversion rate on a few different websites and they all give variation!
Thanks
Danni
want to do your recipe justice!
Made these for a family get together. We all love peanut butter and chocolate. They turned out great. One of my favorites now.