Recipe Apple Oat Snack Cake

Ingredients
1 cup boiling water
1/2 cup old-fashioned oats
1 3/4 cups all-purpose flour
1 teaspoon baking soda
1 teaspoon ground cinnamon
1/4 teaspoon salt
3/4 cup sugar
3/4 cup packed brown sugar
1/3 cup unsweetened applesauce
1 egg
1 1/2 teaspoons vanilla extract
1 medium apple, peeled and chopped
TOPPING:
1/2 cup old-fashioned oats
1/4 cup all-purpose flour
1/4 cup packed brown sugar
1 teaspoon ground cinnamon
3 tablespoons cold butter

Directions
In a bowl, combine boiling water and oats; set aside. In a large bowl, combine the flour, baking soda, cinnamon and salt. In a mixing bowl, combine the sugars and applesauce; beat well. Add the egg, vanilla and oat mixture; mix well. Stir into dry ingredients just until combined. Fold in apple.
Pour into an 8-in. square baking dish coated with nonstick cooking spray. For the topping, combine the oats, flour, brown sugar and cinnamon. Cut in butter until mixture resembles coarse crumbs; sprinkle over batter. Bake at 350 degrees F for 40-45 minutes or until a toothpick inserted near the center comes out clean. Cool on a wire rack.