These donuts can also be dipped in a simple glaze made from boiled-down apple cider, butter, and confectioners' sugar.
- 1 3⁄4 cups (7 3/4 oz.) all-purpose flour, sifted
- 1⁄4 cup (1 1/8 oz.) whole wheat graham flour
- 3 1⁄2 tsp. ground cinnamon
- 2 tsp. baking powder
- 1 tsp. baking soda
- 1⁄2 tsp. kosher salt
- 2 tbsp. unsalted butter
- 1 1⁄2 cups sugar
- 2 egg yolks
- 1 tsp. vanilla extract
- 1⁄4 cup apple cider
- 1⁄4 cup buttermilk
- Canola oil, for forming and frying
Whisk flours, 2 tsp. cinnamon, baking powder, soda, and salt in a bowl; set aside. In the bowl of a stand mixer fitted with a paddle attachment, beat butter and 1⁄2 cup sugar until fluffy. Add yolks, vanilla, cider, and buttermilk; mix until smooth. With the motor running, slowly add dry ingredients and mix until a soft, sticky dough forms.
Combine remaining cinnamon and sugar in a bowl; set aside. Heat 2" oil in a 6-qt. saucepan until a deep-fry thermometer reads 350°. Using lightly oiled hands, roll about 1⁄4 cup batter into a loose, sticky ball; pat gently into a disk. With your thumb, make a 1 1⁄2" hole in the center of dough; carefully slide into oil and fry, flipping once, until golden, 3–4 minutes. Using a slotted spoon, transfer to a baking sheet with a wire rack; repeat with remaining dough. Let donuts cool completely; toss in cinnamon-sugar mixture.