Ingredients
Equipment
Method
Prep
- Preheat oven to 350F. Grease a 9x13 inch baking pan and line with parchment, leaving an overhang for easy removal.
- In a medium bowl, whisk together flour, brown sugar, granulated sugar, pumpkin pie spice, and salt. Pour in melted butter and stir with a fork until large clumps form and no dry flour remains. Set aside.
- In a medium bowl, whisk together flour, baking powder, baking soda, pumpkin pie spice, and salt.
- In a large bowl with an electric mixer, beat softened butter, granulated sugar, and brown sugar on medium speed until light and fluffy, about 3 minutes. Scrape down the bowl as needed.
- Beat in eggs one at a time until fully incorporated. Mix in pumpkin puree, sour cream, and vanilla until smooth. The mixture will look slightly curdled - this is normal.
- Add dry ingredients to wet ingredients and mix on low speed just until no streaks of flour remain. Do not overmix.
- Spread batter evenly in prepared pan. Sprinkle crumb topping in an even layer, breaking up any very large clumps. Bake until a toothpick inserted in the center comes out clean, 40 to 45 minutes. The crumb should be golden and the cake should spring back when lightly pressed.
- Cool in pan on a wire rack for at least 30 minutes before slicing. Serve warm or at room temperature.
Notes
For extra crunch, add 1/2 cup chopped pecans to the crumb topping. The cake keeps well covered at room temperature for 2 days or refrigerated for 5 days - bring to room temperature before serving. You can substitute Greek yogurt for sour cream if needed.
