Mix almond flour, flour, baking powder, sweetener, salt, and xanthum gum in a medium bowl.
Whisk together egg, milk, vanilla extract, and liquid sweetener in a separate bowl.
Melt butter in a small microwave safe bowl.
Mix dry ingredients into wet ingredients. Stir just to combine. Slowly pour some of the melted butter into the batter, and stir to combine; working in 3 batches until the butter is stirred in.
Let batter rest for 1 minute. Plug in Dash Mini Donut Maker Express and get to temp.
Scoop batter into a 1-gallon plastic ziplock bag and seal partway. Snip off a small slice of the corner of the bag to make a whole to pipe the dough into donut molds.
Add batter to donut molds. Give a generous squeeze around the mold. The Batter should take up most of the mold and will puff out to fill the mold.
Close the lid.
Bake for 1 1/2 minutes. Use a toothpick to flip the donuts and bake for another 1 1/2 - 2 minutes.
Remove from Dash Mini Donut Maker Express carefully, they will be hot. Set aside and let them cool and start another batch.