TOFFEE BARS
1 1/2 cups butter
1 1/2 cup packed brown sugar
2 large egg yolks
3 cups flour
1 1/2 tsp vanilla
6 chocolate (Hershey) bars
Mix all together except chocolate bars. Spread on a small lightly sprayed or buttered cookie sheet. Bake at 350 degrees until golden brown (approx 25 minutes). Remove from oven and place chocolate bars on top to melt. Spread over top when melted. Cool thoroughly and slice.