Chocolate-Peanut Butter Swirl Brownies Recipe

Preheat the oven to 350 degrees F (175 degrees C). Line an 8-inch square baking pan with parchment paper.

Place unsweetened chocolate butter and semisweet chocolate in the top of a double boiler over simmering water. Stir frequently scraping down the sides with a rubber spatula to avoid scorching until chocolate is melted about 5 minutes. Remove from the heat and cool to room temperature about 10 minutes.

Whisk sugar eggs and vanilla extract together in a large bowl. Whisk in cooled chocolate mixture. Stir in flour with a spoon until incorporated. Stir in dark chocolate chips and peanut butter chips.

Spread 1/2 of the batter in the prepared baking pan. Take 1/2 of the peanut butter and put it in small dots over top of the batter then use a knife to spread it into a marble-like pattern. Top with remaining batter dot with remaining peanut butter and swirl again.

Bake in the preheated oven until a toothpick inserted into the center comes out clean 25 to 35 minutes. Let cool completely before slicing.