Frosted Peanut Butter Brownies Recipe

Indulge in the ultimate peanut butter brownie experience! These decadent brownies, inspired by Southern Living, are rich, fudgy, and topped with a creamy peanut butter layer and a dreamy marshmallow frosting. A little effort goes a long way for these family favorites – perfect for peanut butter lovers of all ages.

Prep Time 20 mins

Cook Time 65 mins

Calories 141.8 kcal

Protein 5g

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The Forktionary Kitchen Team

Adapted from Food.com, then tested & standardized by Forktionary.

Ingredients for Frosted Peanut Butter Brownies

1 1/2 cups (3 sticks) butter
1/3 cup unsweetened cocoa powder + 1/4 cup unsweetened cocoa powder
2 cups granulated sugar + 2 cups powdered sugar
All Purpose Flour
1/2 teaspoon salt
2 large eggs
1 teaspoon vanilla extract
Chunky Peanut Butter
1/2 cup milk
10 ounces (about 2 cups) marshmallows
Powdered Sugar

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How to Make Frosted Peanut Butter Brownies

Melt 1 cup (2 sticks) of butter and 1/3 cup unsweetened cocoa powder in a saucepan over low heat, stirring constantly until smooth.
Remove from heat and let cool slightly.
In a large bowl, whisk together 2 cups granulated sugar, 1 1/2 cups all-purpose flour, and 1/2 teaspoon salt.
Add the cooled chocolate mixture to the dry ingredients and beat with an electric mixer on medium speed until well combined.
Beat in 2 large eggs and 1 teaspoon vanilla extract until thoroughly blended.
Pour the batter into a greased 15x10 inch jelly roll pan.
Bake at 350°F (175°C) for 20-25 minutes, or until a wooden skewer inserted into the center comes out clean.
While the brownies are baking, prepare the peanut butter topping: Microwave 1 cup creamy peanut butter on medium power for 2 minutes, stirring once until smooth and spreadable.
Spread the warm peanut butter evenly over the warm brownies.
Let the brownies cool completely.
For the marshmallow frosting: Melt 1/2 cup (1 stick) butter in a saucepan over medium heat.
Add 1/2 cup milk and 10 ounces (about 2 cups) marshmallows to the saucepan and stir constantly until marshmallows are melted and smooth.
Remove from heat and whisk in 1/4 cup unsweetened cocoa powder.
Gradually whisk in 2 cups powdered sugar until the frosting is smooth and creamy.
Spread the marshmallow frosting evenly over the peanut butter layer.
Refrigerate for at least 30 minutes to allow the frosting to set before cutting into squares.

Nutrition Information (Approximate per serving)

Sodium

3 g

Sugar

51g

Fat

15g

Carbs

Recipe Categories (Choose a category and find related recipes!)

Sweets & Sides Desserts The Americas American Southern Vegetarian Game Day Recipes Baking

Recipe Tags (Choose a tag and find related recipes!)

Weeknight Time To Make Course Main Ingredient Preparation Occasion Desserts Kid Friendly Cookies And Brownies Chocolate Bar Cookies Brownies Dietary Number Of Servings 4 Hours Or Less

Frequently Asked Questions

How long does it take to make Frosted Peanut Butter Brownies?

Frosted Peanut Butter Brownies takes about 85 minutes from start to finish — roughly 20 minutes to prepare and 65 minutes to cook.

How many calories are in Frosted Peanut Butter Brownies?

Frosted Peanut Butter Brownies has approximately 141.8 calories per serving, with about 5 g protein, 5 g carbohydrates and 11 g fat.

What ingredients do I need for Frosted Peanut Butter Brownies?

The key ingredients for Frosted Peanut Butter Brownies are Butter, Cocoa, Sugar, All Purpose Flour, Salt, Eggs. See the full list with measurements above.