In a standing mixing bowl, beat eggs and sugar
Add the milk, sour cream, vanilla and melted butter then mix well
In another bowl, combine flour(s), baking soda, baking powder, salt and xanthan gum
Slowly add the dry ingredients to the wet ingredients and mix well
On a HEAVILY gluten-free all-purpose or white rice floured counter, roll out the donut dough (It will be wet) 1 inch thick using plenty of white rice or all-purpose flour to get it pliable and to dust the rolling pin
Cut the dough into donuts and donut holes
Heat the oil either in a deep fryer or deep fry pan until it reaches roughly 375°
Fry donuts for 2-3 minutes making sure to flip once
Place cooked donuts on a baking rack over a paper towel lined baking sheet to let excess grease drain off
Meanwhile, make an easy glaze by whisking 1 C powdered sugar, 1 T melted butter and 2-3 tsp. milk and ½ tsp. vanilla or you can also make chocolate glaze like we discuss below
Dip warm donuts into the glaze then let then drip on a wire baking rack