For a classic look, spread half the batter, sprinkle a layer of cinnamon sugar, and then add the remaining batter before the final crumb topping [24].

Use a box of yellow cake mix, 1 cup of sour cream, 3 eggs, and ½ cup of vegetable oil for a faster prep [11].

Fold in 1 ½ cups of fresh blueberries [17] or layer in apple butter [52] for extra flavor.

This recipe features a moist, buttery base with a thick, crunchy streusel topping. For the Cake: Flour: 1 ½ cups all-purpose flour [13, 19, 43] Sugar: ½ cup granulated sugar [13, 19, 43] Leavening: ½ tsp baking soda and ½ tsp salt [13, 43]

Gradually add the wet ingredients to the dry, stirring just until combined (do not overmix) [13, 43]. Assemble: Spread the batter into the prepared pan [13, 43].

Bake for 30–35 minutes, or until a toothpick inserted in the center comes out clean [13, 43].

1 egg, ½ cup sour cream (for moisture), ¼ cup milk, ¼ cup melted butter, and 1 tsp vanilla extract [13, 43] For the Crumb Topping: Sugar: ½ cup brown sugar [13, 43] Flour: 1/3 cup all-purpose flour [13, 43] Spice: 1 ½ tsp ground cinnamon [13, 43] Fat: ¼ cup cold, cubed butter [13, 43] Instructions

In a medium bowl, whisk together the flour, sugar, baking soda, and salt [13, 43].