Instructions

• Preheat your oven to 350 degrees F. Grease a 9×13 inch cake pan with nonstick spray or rub with butter.
• Make the streusel: In a large bowl, whisk together 3 cups flour, 1 cup brown sugar, ½ cup granulated sugar, 1 teaspoon kosher salt, 1 tablespoon cinnamon, and 1 tablespoon pumpkin pie spice.
• Melt 1 cup butter in a medium bowl in the microwave. Pour into the larger bowl and stir the butter into the flour. (save the bowl)
• In a large bowl or stand mixer, whisk together 2 and ¼ cups flour, 1 and ½ cups granulated sugar, 1 tablespoon baking powder, ¾ teaspoon baking soda, ¾ teaspoon kosher salt, 1 tablespoon pumpkin pie spice, and 1 teaspoon cinnamon.
• Chop ½ cup softened butter into chunks. Add the chopped butter to the flour mixture.
• Use a spatula to scoop half the can of pumpkin puree and add it to the flour and butter, then blend.
• In the same medium bowl that you melted butter in, add all the remaining pumpkin from the can. Whisk in 4 eggs, ¼ cup vegetable oil, and 1 tablespoon vanilla. Beat well until the eggs are well blended.
• Add the egg mixture to the flour mixture in 3 additions, beating for about 20 seconds after each one.
• Spread 2 cups of batter into the bottom of your prepared cake pan. Sprinkle 1 cup of streusel evenly over the top.
• Spread another 2 cups batter on top, then add another 1 cup streusel on top, and the rest of the batter.
• Spread another 2 cups of streusel on top of the cake. Bake the cake at 350 for 35 minutes.
• Remove the cake from the oven and sprinkle all the remaining streusel on top. Bake for another 10-15 minutes.
• Let the cake cool on a wire rack for at least 15-20 minutes before cutting into it.
• Make the icing: In a medium bowl, beat ¼ cup butter until smooth, then add 1 teaspoon vanilla, ½ teaspoon kosher salt, 3 tablespoons milk, and 2 cups powdered sugar. Beat until very smooth.
• Drizzle the icing over the cake.
• The cake is best served warm! Zap individual servings in the microwave for 10-20 seconds.
• This cake will keep well covered on the counter for 2-3 days. After that, put it in the fridge.