Peanut Butter Swirl Bars
["1/2 c. crunchy-style peanut butter", "1/3 c. softened butter", "3/4 c. packed brown sugar", "3/4 c. granulated sugar", "2 eggs", "2 tsp. vanilla", "1 c. flour", "1/4 tsp. baking powder", "1/4 tsp. salt"]
["Combine the first 4 ingredients.", "Beat eggs and vanilla until creamy. Combine the rest of the ingredients.", "Spread into a 13 x 9 x 2-inch pan. Sprinkle 1 (12 ounce) package chocolate chips over surface.", "Place in a 350\u00b0 oven for 5 minutes.", "Remove from oven. Run knife through to marbleize. Return to oven for 30 minutes or until done.", "Makes 4 dozen 2 x 1-inch bars."]
["crunchy-style peanut butter", "butter", "brown sugar", "sugar", "eggs", "vanilla", "flour", "baking powder", "salt"]