Ingredients
Equipment
Method
Make the cake
- Preheat the oven to 350°F.
- Coat a 9x13-inch baking pan with nonstick cooking spray.
- Whisk the flour, baking powder, cinnamon, nutmeg, and salt in a medium bowl.
- Beat the 1/2 cup butter and granulated sugar in a large bowl with an electric mixer on medium speed until pale and fluffy, about 3 minutes.
- Beat in the eggs one at a time, then mix in the vanilla extract.
- Add the flour mixture in three additions, alternating with 1 cup eggnog and beginning and ending with the flour mixture; mix on low just until combined.
- Spread the batter evenly in the prepared pan.
- Bake for 30–35 minutes, until a toothpick inserted in the center comes out clean.
- Cool the cake completely in the pan on a wire rack, at least 1 hour.
Make the buttercream
- Beat the remaining 1 cup butter in a large bowl with an electric mixer on medium speed until smooth and creamy, about 2 minutes.
- Add the powdered sugar gradually on low speed.
- Beat in the remaining 1/4 cup eggnog, vanilla, and salt until fluffy, about 2 minutes.
- Spread the buttercream evenly over the completely cooled cake.
Notes
For fluffy buttercream, make sure the cake is completely cool before frosting. Refrigerate covered for 3–4 days; freezing is fine, preferably in individual slices. For a dairy-free variation, use dairy-free butter and eggnog.
