1. Heat oven to 350°F. Grease 13x9x2-inch baking pan.
2. Stir together flour, granulated sugar, cocoa, brown sugar, baking powder and salt in large bowl. Add butter; cut in with pastry blender or with hands until mixture is well blended, resembling coarse crumbs. Add eggs; mix well. Spoon mixture into prepared pan, pressing firmly onto bottom of pan.
3. Bake 8 to 10 minutes or until mixture is set. Remove from oven; sprinkle peanut butter chips on top. Drizzle sweetened condensed milk evenly over chips; top with coconut. Return to oven; bake 20 to 25 minutes or until lightly browned on top. Cool completely in pan on wire rack. Cut into bars. Makes 24 to 36 bars.