Preheat oven to 375F and grease a donut pan with butter or oil.
In a medium-large bowl combine the dry ingredients (whole wheat pastry flour, baking powder, nutmeg, and salt).
In a separate medium bowl, whisk together the eggnog, maple syrup, egg, melted butter, and vanilla extract.
Mix the wet ingredients with the dry ingredients.
Spoon or pipe the batter into the donut holes. Bake for 9-11 minutes until inserted toothpick comes out clean and donuts are fully set.
Wait about an hour to let the donuts fully cool to room temperature. Then, mix the powdered sugar with the eggnog to make the glaze. Dip donuts in the glaze and then add sprinkles.
Eat immediately or store in the refrigerator until you are ready to eat!