PREHEAT oven to 350° F. Grease 8-inch-square baking pan.
PLACE whole bar of dough in prepared pan. Allow to soften for 5 to 10 minutes. Using fingertips, pat dough gently to fill pan.
BAKE for 24 to 26 minutes or until wooden pick inserted in center comes out slightly sticky.
SPRINKLE morsels over hot brownie. Let stand for 5 minutes or until morsels are shiny; spread evenly over brownie. Top with peanuts. Cool completely in pan on wire rack. Cut into bars.