1
In a large mixing bowl, whisk together all the dry ingredients.
2
In a high-powered blender, combine all the wet ingredients. Blend until the mixture is creamy.
3
Pour the blender mixture into the dry ingredients. Using a spatula, gently fold until well combined, achieving a fluffy and light batter.
4
Pour the batter into the prepared pan, smoothing the top. Bake in the preheated oven at 350F (180C) for 40 minutes, or until a toothpick inserted in the center comes out clean.
5
Whip on a medium speed with an electric mixer until the mixture is fully combined and has a smooth, creamy consistency. Refrigerate until the cake is completely cooled.
6
Remove the pan from the oven. Allow the cake to cool in the pan for about 10 minutes. Afterwards, transfer it to a cooling rack and let it cool completely. Spread the frosting on top of the cake and dust with cinnamon or pumpkin pie spice.
7
Store the cake in an airtight container in the refrigerator for up to 3 days.