1Preheat oven to 350 degrees F (175 degrees C). Grease a 9x13-inch baking pan.
2Sift flour, cocoa powder, baking powder, and salt together in a large bowl. Beat sugar, butter, and vanilla extract together in a separate bowl; beat in eggs, one at a time, until sugar mixture is smooth. Stir flour mixture into sugar mixture until incorporated. Spread batter into the prepared baking pan.
3Bake in the preheated oven until a toothpick inserted in the center of the brownies comes out clean, about 20 minutes.
4Mix peanut butter and chocolate chips together in a microwave-safe bowl; heat in microwave until chocolate chips are melted, stirring every 30 seconds, 1 to 2 minutes. Fold crispy rice cereal into peanut butter mixture; heat in microwave until mixture smooth and spreadable, about 30 seconds.
5Sprinkle brownies with marshmallows and bake until marshmallows are slightly cooked, 2 minutes. Pour chocolate mixture evenly over marshmallows. Allow to cool completely before cutting into squares.
Ingredients
18 servings
276 cals
1/2 cup all-purpose flour
1/3 cup unsweetened cocoa powder
1/4 teaspoon baking powder
1/4 teaspoon salt
1 cup white sugar
1/2 cup butter, melted
1 teaspoon vanilla extract
2 large eggs
1 cup peanut butter
1 cup semisweet chocolate chips
2 cups crispy rice cereal (such as Rice Krispies®)