Preheat oven to 350°F . Grease a large silicone donut pan well.
In a bowl, whisk flour, baking powder, baking soda, salt, cinnamon, nutmeg, allspice, and cardamom.
2 cups all-purpose flour, 1 tsp baking powder, ½ tsp baking soda, ½ tsp salt, 1 & 1/4 tsp ground cinnamon, ¼ tsp ground nutmeg, ¼ tsp allspice or apple pie spice, 1/ tsp ground cardamom
In a separate bowl, whisk egg and sugars until smooth.
1 large egg, ½ cup brown sugar, ⅓ cup granulated sugar
Add melted butter, oil, vanilla, buttermilk, and apple butter. Whisk in cooled apple cider reduction and whisk one more time to combine.
¼ cup unsalted butter, ¼ cup neutral oil, 1 teaspoon vanilla extract, ¼ cup buttermilk, 2 tablespoons apple butter
Add dry ingredients to wet and gently fold until just combined. Do not overmix.
Pipe or spoon batter into the donut mold, filling each cavity ¾ full.