Preheat oven to 350°F. Coat a bundt pan with nonstick spray.
In a medium bowl, whisk together all-purpose flour, cornstarch, cocoa, baking powder, baking soda, cinnamon, ginger, cardamom, nutmeg, allspice, and salt. Set aside.
In a large bowl or the bowl of a stand mixer, whisk together pumpkin, and brown sugar. Beat in eggs, then vegetable oil and vanilla, mixing until smooth.
15 ounces pumpkin purée, 1 cup granulated sugar, 3/4 cup brown sugar, 2 large eggs, 1/4 cup vegetable oil, 1 tablespoon pure vanilla extract
Mix in 1/3 of the dry ingredients, then 1/2 of the milk, making sure each addition is completely mixed in before adding the next. Repeat, then finish with the remaining 1/3 dry ingredients. Scrape down the sides and bottom of the bowl to ensure the batter is fully mixed.
1 cup milk
Pour the batter into the prepared bundt pan, spreading evenly.
Bake the cake for 50-65 minutes, until a toothpick inserted in the cake comes out with only a few moist crumbs attached. Let cool on a wire rack for 15 minutes. Remove from the pan and let cool completely on the rack, about 2 hours.
To glaze cake: Combine powdered sugar, milk, and vanilla (if using) in a small bowl, stirring until completely smooth. Add more sugar or milk as needed to achieve desired consistency. Place the cake on a serving plate and drizzle the glaze over the top. Let harden before serving.
3/4 cup unsifted powdered sugar, 1 tablespoon milk, 1/2 teaspoon pure vanilla extract
Notes
This recipe was updated from the original posted November 2014.
To make the original recipe, swap in whole wheat pastry flour for 3/4 cup of all-purpose flour, remove the cornstarch, and swap applesauce in equal amount for the vegetable oil.
The individual spices can be replaced with 2 teaspoons pumpkin pie spice.