3 tablespoons unsalted butter - 3 tablespoons of unsalted butter
3 tablespoons granulated sugar - 3 tablespoons of granulated sugar
1 teaspoon cinnamon - 1 teaspoon of cinnamon
Streusel topping and Cake ingredients (made together and divided):
1 1/4 cups whole wheat pastry flour - 1 1/4 cups of whole wheat pastry flour
1 cup brown sugar - 1 cup of brown sugar
1/2 teaspoon salt - 1/2 teaspoon of salt
1/2 cup unsalted butter, softened - 1/2 cup of softened unsalted butter
3 tablespoons granulated sugar - 3 tablespoons of granulated sugar
2 teaspoons pumpkin pie spice - 2 teaspoons of pumpkin pie spice
1 teaspoon baking soda - 1 teaspoon of baking soda
3/4 cup pumpkin puree (canned or fresh roasted) - 3/4 cup of pumpkin puree (either canned or freshly roasted)
1/3 cup sour cream - 1/3 cup of sour cream
2 large eggs - 2 large eggs
For the apple filling:
4 large Granny Smith apples (or a combination of your favorite baking apples), peeled and thinly sliced - 4 large Granny Smith apples (or a mix of your preferred baking apples), peeled and thinly sliced