Recipe adapted from Southern Lady. Read more at Bake or Break.
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Preheat oven to 350°. Line a 9″x 13″x 2″ pan with aluminum foil. Place butter and chocolate in a microwave-safe bowl. Microwave at 30-second intervals until melted. Stir until smooth. Set aside to cool slightly. Whisk together flour and salt. Set aside. In a large bowl, combine chocolate mixture and 2 & 1/2 cups sugar using an electric mixer at medium speed. Mix until well blended. Add eggs, one at a time, beating well after each addition. Mix in vanilla. Gradually add flour mixture, beating just until combined. Stir in peanut butter chips. Spread batter in prepared pan. Combine peanut butter and 2 tablespoons sugar in a small microwave-safe bowl. Microwave for 30 seconds. Stir until smooth. Drop peanut butter mixture by teaspoonfuls over brownie batter. Use a knife to swirl peanut butter mixture into brownie batter. Sprinkle top with peanut butter cups. Bake for 40-45 minutes, or until a wooden pick inserted in the center comes out still slightly sticky. Cool completely in pan on wire rack. |