Mix:
2 cups brown sugar
2 cups flour
1 tsp salt
Cut in 1/2 cup soft butter. Take out 1 cup of mixture and set aside.

Add to remaining:
1 tsp baking soda
1 tsp vanilla
1 egg
1 cup sour milk

Pour into cake pan. Sprinkle extra mixture over top. Sprinkle 6 coarsely chopped Heath Bars. Bake at 350 degrees for approximately 30-35 minutes.