1 c. butter
1 c. brown sugar
2 c. flour
1 egg yolk
1/2 tsp. vanilla
6 oz. pkg. chocolate bits, or 6 Hershey bars
1 c. (or less) nuts

Cream butter. Add sugar and work until light and fluffy. Add egg yolk, vanilla, and sifted flour. Spread thinly on flat pan (about 10 x 15 inch). Bake at 350 degrees for 15 to 20 minutes. Remove from oven, and immediately sprinkle with chocolate bits, or lay candy bars on top. Allow to sit and melt a few minutes, then spread evenly, and sprinkle with chopped nuts. Cut into squares or bars while warm.