- Doughnuts:
- 1 cup apple cider
- 1 cup white sugar
- 1/4 cup butter, at room temperature
- 2 eggs
- 1/2 cup buttermilk
- 3 1/2 cups all-purpose flour, or more as needed
- 2 teaspoons baking powder
- 1 teaspoon baking soda
- 1/2 teaspoon ground cinnamon
- 1/2 teaspoon salt
- 1/8 teaspoon ground nutmeg
- 2 cups vegetable oil for frying, or as needed
- Glaze:
- 1 cup confectioners' sugar
- 2 tablespoons apple cider
- Boil 1 cup apple cider in a small pot until reduced to 1/4 cup, about 10 minutes. Remove pot from heat and cool to room temperature.
- Beat white sugar and butter together with an electric mixer until creamy and smooth; add eggs, 1 at a time, beating well before each addition. Mix buttermilk and reduced apple cider into creamed butter mixture.
- Whisk flour, baking powder, baking soda, cinnamon, salt, and nutmeg together in a bowl. Slowly stir flour mixture into creamed butter mixture just until dough is combined.
- Turn dough onto a lightly floured piece of parchment paper. Sprinkle dough with flour and roll to 1/2-inch thickness, adding more flour if dough is sticky. Cut dough into doughnuts using a 3-inch-wide doughnut cutter and arrange on a baking sheet; refrigerate until chilled, 20 to 30 minutes.
- Heat at least 3 inches of oil in a deep-fryer or large saucepan to 350 degrees F (175 degrees C).
- Whisk confectioners' sugar and 2 tablespoons apple cider together in a bowl until glaze is smooth.
- Fry doughnuts in the hot oil, 2 to 3 at a time, until golden brown, 1 to 2 minutes per side; remove with a slotted spoon and drain on paper towels. Pour glaze over warm doughnuts.