2 cups brown sugar
2 cups all-purpose flour
1/2 cup soft butter
1 egg
1 teaspoon vanilla
1 cup milk
1 teaspoon baking soda
1 teaspoon salt
1 cup chocolate chips

Mix the brown sugar, flour and butter together until crumbly. Reserve 1 cup for topping. To the remaining mix, add the egg, vanilla, milk, baking soda and salt. Mix well. Pour batter into a sprayed 9x13 pan. Top with reserved 1 cup crumbs and sprinkle the 1 cup chocolate chips over the top. Bake at 350 degrees for 25 minutes.