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–+ servings
Marshmallow Peanut Butter Brownies

Peanut Butter Marshmallow Brownies

The perfect brownies swirled with marshmallow fluff and peanut butter! Easy to make and are a great brownie recipe to make for parties.
Course brownies
Cuisine American
Diet Low Salt
Keyword brownies, marshmallow creme, marshmallow fluff, peanut butter
Prep Time 15 minutes
Cook Time 30 minutes
Total Time 45 minutes
Servings 24 brownies



  • Adjust an oven rack to the middle of the oven. Preheat the oven to 350F [180C]. Grease a 9 x 13 in [23 by 33 cm] baking pan and line with a parchment sling.
  • In a medium bowl, mix together the peanut butter, sugar, butter, vanilla, and salt until combined and completely smooth.
  • Make the brownie batter as directed (but do not bake it!). Pour the brownie batter into the prepared pan. Dollop the peanut butter filling and the marshmallow cream over the top, alternating the two. Drag the tip of a butter knife through the batter, creating swirls.
  • Bake until the sides of the brownies have set, the top is starting to crackle and look glossy, and a wooden skewer or toothpick inserted into the center comes out with crumbs, 26 to 32 minutes. The batter on the toothpick should not be wet but should have a good amount of crumbs clinging to it. Transfer the pan to a wire rack and let cool completely. Use the parchment sling to gently lift the brownies from the pan.
  • Cut them into bars and serve. Store the brownies in an airtight container for up to 3 days.