In mixing bolw, cream butter and sugar. Add egg whites, beat well. Blend in peanut butter and vanilla. Combine flour, baking soda and salt. add to creamed mixture and mix well. Stir in chopped candy bars. Shaped in 4 cm balls and place on greased baking sheets. Bake at 180ºC or 10-12 minutes or til golden brown. Cool on rack. Posted to Fabfood 0.091836734693878 Contributor: Taste of Home, June/July '98