01 -
Add apple cider to a saucepan and simmer over medium heat, stirring occasionally, until reduced to 3/4 cup. Set aside to cool.
02 -
While the apple cider cools, preheat oven to 350°F. Thoroughly grease a 10-12 cup Bundt pan with butter, ensuring all crevices are covered. Lightly dust with flour and tap out excess.
03 -
In a medium bowl, whisk together flour, baking powder, baking soda, ground cinnamon, ground nutmeg, and salt until well combined.
04 -
In a large mixing bowl or stand mixer, beat softened butter, granulated sugar, and brown sugar until light and fluffy, about 3 to 5 minutes.
05 -
Add vanilla extract, then beat in eggs one at a time, mixing thoroughly after each addition.
06 -
Mix in sour cream, then pour in cooled apple cider reduction and mix on low speed until combined.
07 -
Gradually add the flour mixture to the wet ingredients, about 1/2 cup at a time, mixing until the batter is smooth and uniform.
08 -
Pour batter into the prepared Bundt pan, smoothing the top with a spatula. Bake for 45 to 50 minutes, or until a toothpick inserted in the center comes out clean.
09 -
Let cake cool in the pan for 10 to 15 minutes. Carefully transfer to a wire rack to cool completely.
10 -
Combine 1/2 cup granulated sugar and 1 teaspoon ground cinnamon in a small bowl. Melt 1/4 cup unsalted butter separately.
11 -
While cake is still slightly warm, brush surface with melted butter. Generously sprinkle cinnamon sugar mixture over the cake, pressing lightly so it adheres.