01 - Preheat oven to 350°F. Thoroughly grease and flour a 10-cup bundt pan.
02 - Simmer apple cider in a small saucepan over medium heat until reduced to 3/4 cup, about 15 minutes. Let cool.
03 - Whisk together flour, baking powder, baking soda, salt, cinnamon, nutmeg, allspice, and cloves in a medium bowl.
04 - Using an electric mixer, beat butter, granulated sugar, and brown sugar until light and fluffy, approximately 3 to 4 minutes.
05 - Add eggs one by one, beating well after each addition. Mix in sour cream and vanilla extract until combined.
06 - Add flour mixture in three parts, alternating with cooled reduced apple cider, starting and ending with flour mixture. Stir gently to combine.
07 - Carefully fold diced apples into the batter until evenly distributed.
08 - Pour batter evenly into prepared bundt pan and smooth the surface.
09 - Bake for 45 to 55 minutes or until a toothpick inserted in the center comes out clean.
10 - Let cake rest in the pan for 15 minutes, then invert onto a wire rack to cool completely.
11 - Whisk powdered sugar with apple cider until smooth and pourable. Drizzle over cooled cake before serving.