Preheat your oven to 350° F and grease your donuts pans.
In a large bowl add your sugar, vanilla extract, oil, and sour cream. Whisk until well combined.
Add your eggs in one at a time, mixing in between until incorporated.
In a separate bowl, add your flour, cornstarch, baking soda, baking powder, salt, cinnamon, nutmeg, and mulling spices, and whisk until well combined.
Add 1/3 of your dry ingredients mixture into your wet ingredients and whisk until just incorporated. Add half your cider and mix again.
Again, add another 1/3 of your dry ingredients and mix until just combined. Be careful not to over mix. Add the second half of your cider and mix until just combined. Then add your last 1/3 of dry ingredients and whisk until combined.
Pour your batter into your greased donut pans and and bake at 350℉ for 10-12 minutes. I filled mine up a about 3/4 the way full.
Remove from oven and let cool then using a butter knife gently help release your donuts from the pan. Continue with the rest of your batter.
To make the glaze, add your cider and powdered sugar into a bowl and stir until combined. If glaze is too thick add a small splash more of cider, milk or water and if your glaze is too thin, add more powdered sugar.
Once all your donuts are baked and cooled slightly, dip into your glaze and set on a cooling wrack to set up.
Sprinkle with a dash of nutmeg and a pinch of orange zest.
Share and Enjoy!!