If cooler fall weather has you craving pumpkin desserts, try this old-fashioned cake recipe. This homey pumpkin cake is made with brown sugar, cinnamon, and buttermilk for a fragrant, not-too-sweet treat. Feel free to use canned mashed pumpkin for an easy way to speed up this recipe. The cake is delicious eaten on its own, or you can whip up a quick Spiced Whipped Cream to spread over and between the layers. The Whipped Cream keeps this cake light and fresh for the season.