Fathers Day Fudge

1 6 oz (3/4 c) chocolate chips
1 c peanut butter
1 stick margarine
1 c powdered sugar

Cook first 3 ingredients in a saucepan over medium heat, stirring constantly, until melted and smooth. Remove from heat and add powdered sugar. Stir until smooth. Pour into a buttered 8-inch square pan. Chill until firm and cut into squares.