Ingredients
Equipment
Method
Prepare the Streusel Topping
- Mix brown sugar, flour, and cinnamon in a bowl. Add melted butter and mix until crumbs form. Set aside.
Combine Dry Ingredients
- In a medium bowl, whisk flour, baking soda, baking powder, cinnamon, nutmeg, ginger, and salt.
Mix Wet Ingredients
- In a large bowl, beat oil with brown and granulated sugars. Add eggs and mix until smooth. Stir in pumpkin purée and vanilla.
Add Dry Ingredients to Wet
- Add half the dry ingredients, then the buttermilk, then the remaining dry mixture. Mix gently until just combined—do not overmix.
Assemble the Cake
- Pour batter into a greased 9×9-inch baking pan. Sprinkle the streusel evenly on top.
Bake
- Bake at 350°F (175°C) for 40–45 minutes, or until a toothpick inserted into the center comes out clean.
Cool and Glaze (Optional)
- Let cake cool for 15–20 minutes. Whisk glaze ingredients and drizzle over the warm cake, if desired.