Crumb Cake Cook Time: 40 minutes Servings: 15 Ingredients - 5 1/2 cups flour - divided - 2 cups 5 tablespoons butter - softened and divided - 1 teaspoon baking powder - 1 teaspoon baking soda - 1 1/2 teaspoons salt - divided - 1 cup sugar - 3 eggs - 1 1/4 cups sour cream - 1 teaspoon vanilla extract - 1 cup brown sugar - light and packed - 2 tablespoons cinnamon     Classic cake with a crumbly topping that is wonderful with a cup of coffee.   Directions Preheat oven to 350° F. Butter a 9x13 baking pan. In a mixing bowl, combine 2 1/2 cups of flour, baking powder, baking soda and 1/2 teaspoon of salt. Set aside.	1

	Beat together 10 tablespoons of butter and sugar until creamed and fluffy. Add eggs, one at a time, until each is incorporated nicely. Mix in the vanilla. Gradually add in the flour mixture and then the sour cream. Spread the batter into the buttered pan. In a small bowl, add 3 cups of flour, brown sugar, cinnamon and 1 teaspoon of salt. Cut in 1 3/4 cups of butter with a pastry blender or fork until crumbly. Sprinkle this over the cake batter. Bake for 35-40 minutes or until done. Cool on a wire rack.	2