Apple Butter Bars

1 cup brown sugar, firmly packed
1 1/2 cups flour
3/4 cup butter
1 1/2 cups oatmeal
1/2 tsp baking soda
1 tsp vanilla extract
1/2 tsp salt
apple butter

Mix all ingredients except apple butter until crumbly. Spread 1/2 of the mixture in a 9 x 13 greased pan. Spread applebutter over crumbly mixture. Cover with the remaining mixture of crumbs. Bake in a 350 oven for 20-25 minutes. May be served with whipped cream