Ingredients:
For the Crumble Topping:
1 cup all-purpose flour
1 cup packed light brown sugar
1 tsp ground cinnamon
½ tsp ground nutmeg
¼ tsp salt
½ cup unsalted butter, cold and cubed
For the Pumpkin Spice Cake:
2 cups all-purpose flour
3 tsp baking powder
1 tsp salt
1 tsp ground cinnamon
½ tsp ground ginger
¼ tsp ground nutmeg
¼ tsp ground cloves
1¼ cups pumpkin puree (not pumpkin pie filling)
½ cup vegetable oil
2 cups granulated sugar
2 large eggs, room temperature
1 tsp vanilla extract
1 cup buttermilk (or milk with 1 tsp lemon juice/vinegar)
For the Vanilla Drizzle:
1 cup powdered sugar
2 tbsp milk
¼ tsp vanilla extract
Instructions:
- Prepare the Crumble Topping:
Preheat your oven to 350°F (175°C) and grease a 9×9-inch or 9×13-inch baking pan.
In a medium bowl, whisk together the flour, brown sugar, cinnamon, nutmeg, and salt.
Using a pastry cutter or your hands, cut the cold butter into the dry ingredients until it resembles coarse crumbs. Set aside.
- Make the Pumpkin Spice Cake:
In a large bowl, whisk together the flour, baking powder, salt, cinnamon, ginger, nutmeg, and cloves.
In a separate bowl, mix the pumpkin puree, vegetable oil, and sugar until smooth.
Add the eggs one at a time, beating well after each addition. Stir in the vanilla extract.
Gradually add the dry ingredients to the pumpkin mixture, alternating with the buttermilk, and stir until just combined. - Assemble & Bake:
Pour the cake batter into the prepared pan and spread it evenly.
Sprinkle the crumble topping over the cake batter and gently press it into the surface.
Bake for 30-35 minutes for a 9×9 pan (or 20-25 minutes for a 9×13 pan), or until a toothpick inserted into the center comes out with just a few moist crumbs.
Let the cake cool slightly in the pan.