Combine margarine, cake mix, and one egg, beaten. Press into 9x13-inch pan. Beat together cream cheese, brown sugar, powdered sugar, 2 eggs, and vanilla. Pour over crust. Bake at 325° for 45 minutes. Cool. When cool, dust top of cookies with additional sifted powdered sugar.
This Interstate Bar Cookies recipe is from the Best of the Best from the Plains Cookbook Cookbook. Download this Cookbook today.
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