Apple Coffee Cake Recipe

Apple Coffee Cake recipe.
Ingredients:
Coffee Cake Topping
3/4 cup all-purpose flour
1/2 cup packed brown sugar
4 tbsp. butter
1/2 tsp. ground cinnamon
Apple coffee cake ingredients
1 boxed pound cake mix 16 oz.
8 oz. sour cream
2 medium eggs
1 tsp. vanilla extract
2 large Granny Smith apples (peeled, thinly sliced)
Preparation
In mixing bowl combine topping ingredients and mix until coarse crumbs result.
Chill topping, preheat [...]