Peanut Butter Swirl Bars
["1/2 c. crunchy peanut butter", "1/3 c. soft margarine", "3/4 c. brown sugar", "2 eggs", "3/4 c. white sugar", "2 tsp. vanilla", "1 c. flour", "1 tsp. baking powder", "1/4 tsp. salt", "2 c. chocolate chips"]
["Combine peanut butter, sugars, eggs, margarine and vanilla. Cream together and then add dry ingredients.", "Spread onto greased 13 x 9 x 2-inch cookie sheet.", "Sprinkle 2 cups chocolate chips over surface.", "Bake in a preheated 350\u00b0 oven for 5 minutes. Remove pan from oven and run knife through batter to marble.", "Bake 20 minutes more."]
["crunchy peanut butter", "margarine", "brown sugar", "eggs", "white sugar", "vanilla", "flour", "baking powder", "salt", "chocolate chips"]