Preheat oven to 325°F/165°C.
Grease a 12 cup bundt pan (or 10 cup) with butter and flour or spray generously with baking spray.
In a medium bowl whisk the flour, baking powder, baking soda, and salt. Set aside.
3 cups all-purpose flour, 1 teaspoon baking powder, 1/2 teaspoon baking soda, 1 teaspoon salt
In the bowl of a stand mixer cream the butter and sugar at medium speed until light and fluffy, about 3-5 minutes.
1 cup unsalted butter, 2 cups granulated sugar
Add the eggs one at a time, mixing to combine after each.
4 large eggs, room temperature
Add the vanilla extract and eggnog, mix to combine.
1 tablespoon vanilla, 1 1/4 cup eggnog
Add the dry ingredients, mix until combined.
Pour batter into the prepared pan and bake for 65-75 minutes until a toothpick entered into the center comes out clean.
While cake is cooling slightly, make the glaze.