In separate large mixing bowls, mix the wet and dry ingredients separately and then combine them together in one bowl.
Generously grease a donut pan. Transfer the batter to a piping bag and pipe into donut molds in a donut pan. Alternatively you can use a spoon to scoop into donut pan molds.
Bake at 350°F for 16-18 minutes until a toothpick comes out clean.
Allow to cool in pan before carefully removing the donuts. they may stick a little if the pan was not generously greased. Use a rubber spatula to loosen from the pan.
Glaze
Whisk together the melted butter and softened cream cheese and then whisk in the powdered erythritol. Add the cream or milk a little at a time until you have reached desired consistency. You may want a thick and goopy icing or a thin and loose icing. I used 1.5 tablespoons for a thick icing. (Refer to the detailed video instructions below if further clarification is needed)
Video
Notes
Top Tip: Generously grease the donut pan to avoid any sticking.