Americana Flag Cake
- Nonstick cooking spray
- 2 1/2 cups all-purpose flour
- 1/3 cup stone-ground white cornmeal
- 1 teaspoon baking powder
- 1 teaspoon baking soda
- 1/2 teaspoon kosher salt
- 2 sticks (8 ounces) unsalted butter, softened
- 2 cups granulated sugar
- 5 large eggs, at room temperature
- 1 tablespoon pure vanilla extract
- 1 cup buttermilk
For the cake: Preheat the oven to 350 degrees F. Coat a 9-by-13-inch rectangular baking pan with nonstick cooking spray. Line the bottom of the pan with parchment paper and coat again with nonstick cooking spray. Combine the flour, cornmeal, baking powder, baking soda and salt in a small bowl. Whisk together and set aside.
Beat the butter with the granulated sugar on medium-high speed with an electric mixer until smooth and fluffy, 3 minutes. Beat in the eggs, one at a time, until combined, and then beat in the vanilla. Reduce the speed to low and beat in one-third of the flour mixture until just combined. Beat in half the buttermilk and then repeat, adding the flour in two more increments and alternating with the second half of the buttermilk. Stir in the sprinkles. Transfer to the prepared pan and spread the batter evenly. Bake until golden brown and the top springs back to a light touch, 30 to 35 minutes. Cool 15 minutes in the pan.