Spray your pan with olive oil spray.
In a large mixing bowl mix beat the sugar, milk, melted butter, vegetable oil, salt, egg, and vanilla extract.
In another mixing bowl mix together the flour, cocoa powder, and baking powder.
Mix the dry ingredients with the wet ingredients, be careful to scrape the sides of the bowl, to get all of the ingredients.
Mix well.
Using a tablespoon fill the donut cavity with about 2/3 way full.
Set into the air fryer for 10-12 minutes at 320 degrees F.
Let cool slightly before making the glaze, and frosting them.
To make the glaze simply combine the ingredients into a small mixing bowl, and mix until smooth.
Dip your donuts into the glaze, and then let sit for about 5-10 minutes.