REESE'S Peanut Butter Cup Brownies

Heat oven to 350° F. Grease 9-inch square baking pan. Line with parchment paper; grease parchment paper. Remove wrappers and coarsely chop peanut butter cups; set aside.

Place 1-3/4 cups peanut butter cups and oil in medium microwave-safe bowl. Microwave at Medium (50%) 1 minute; stir. If necessary, microwave at Medium an additional 15 seconds at a time, stirring after each heating, until candy is melted and mixture is blended when stirred.

Stir in granulated sugar and brown sugar. Add eggs, one at a time, mixing to combine. Blend in vanilla. Stir together flour and salt; blend into mixture; fold in remaining 1 cup chopped peanut butter cups. Spread batter in prepared pan.

Prepare Peanut Butter Swirl; drizzle over brownie batter. Swirl with metal spatula or knife for marbled effect.

Bake 25 to 30 minutes or until toothpick inserted in center comes out clean or with a few moist crumbs. Cool completely in pan on wire rack. Cut into bars. Store leftover bars in airtight container at room temperature for up to a week.