This post may contain affiliate links. Please read the disclosure policy.

These Peanut Butter S’mores Brownies are loaded with graham crackers, chocolate, marshmallows and peanut butter flavors! These decadent, no bake treats are perfect for summertime parties and picnics!

A stack of peanut butter s'mores brownies on a serving plate

In the heat of summer when it’s too hot for the oven, we love to make these no bake s’mores brownies. They’re melt in your mouth with rich, fudgey flavors! Plus, you can make them several days ahead or even longer, since they also freeze well.

Proof positive you can enjoy s’mores without a campfire … or an oven!


Here’s what you’ll need to make them:

  • Butter: Unsalted butter has the best flavor, but you can use margarine in a pinch
  • Peanut butter: Smooth peanut butter is recommended.
  • Sugar: Granulated sugar, or you can use stevia for fewer calories
  • Eggs
  • Vanilla extract
  • Graham cracker crumbs: You can buy crumbs or pulverize graham cracker sheets yourself
  • Chocolate chips: I recommend semisweet but you can also use milk chocolate chips.
  • Mini marshmallows: Plain mini marshmallows or marshmallow bits

How to Make Peanut Butter S’mores Brownies

You will be making these brownies entirely on the stovetop! Start by melting the butter and peanut butter in a saucepan over low heat until smooth. Then add the eggs, whisking slowly to allow them to cook without curdling.

Next, you’ll be adding the other ingredients one by one to finish the batter, and pouring it into a rectangular baking dish. Top with melted chocolate for the frosting and chill at least 2 hours until firm.

Simply cut into squares or keep them chilled until you’re ready to serve.

Watch Recipe Video

This video tutorial shows you how to make these peanut butter s’mores brownies:

More brownie recipes:

View all desserts

These No Bake S'mores Brownies are a delicious no-bake dessert
5 from 2 votes

S'mores Brownies

These Peanut Butter S'mores Brownies are loaded with graham crackers, chocolate, marshmallows and peanut butter flavors! These decadent, no bake treats are perfect for summertime parties and picnics!
Prep Time: 20 mins
Chilling Time: 2 hrs
Total Time: 2 hrs 20 mins
Servings: 24 servings


  • 3/4 cup unsalted butter, 3 sticks
  • 1/4 cup creamy peanut butter, 4 tablespoons
  • 1 cup granulated sugar
  • 2 large eggs, lightly beaten
  • 1 teaspoon vanilla
  • 2 1/2 cups graham cracker crumbs
  • 2 cup semi-sweet chocolate chips, divided
  • 2 cups mini marshmallows


  • Grease a 9-inch square baking pan and set aside.
  • Place a medium saucepan over low heat. Add the butter and peanut butter, stirring slowly until melted and smooth.
  • Add the eggs and whisk slowly until the mixture starts to bubble, about 2-3 minutes. Remove from heat and stir in the sugar and vanilla. Set aside.
  • In a large bowl, add batter and then fold in graham cracker crumbs, 1/2 cup of the chocolate chips and the marshmallows. Then pour the batter into the prepared pan, spreading with a spatula so it's flat and even.
  • Place the remaining 1 1/2 cups of chocolate chips in a microwaveable bowl. Microwave in 30 second intervals, stirring each time until smooth.
  • Spread the melted chocolate frosting onto the brownies using a spatula. Cover with plastic wrap and chill for at least 2 hours until firm.


  • Make Ahead: You can make them up to 3 days ahead, but keep them covered in the refrigerator. You can also tightly wrap them and freeze for up to 3 months.
Nutrition Facts
S'mores Brownies
Amount Per Serving
Calories 199 Calories from Fat 99
% Daily Value*
Fat 11g17%
Saturated Fat 6g30%
Cholesterol 31mg10%
Sodium 81mg3%
Potassium 83mg2%
Carbohydrates 23g8%
Fiber 1g4%
Sugar 16g18%
Protein 2g4%
Vitamin A 204IU4%
Calcium 17mg2%
Iron 1mg6%
* Percent Daily Values are based on a 2000 calorie diet.

Please read our nutrition disclaimer.

Author: Cindy
Course: Dessert
Cuisine: American
Keyword: s'mores brownies
Did you make this recipe? Leave a comment below!

Recipe tools:

S'mores Brownies made with peanut butter for an easy no-bake recipe loaded with mouthwatering s'more flavors. Make them for takealong snacks, parties, potlucks or picnics! #smoresbrownies