For the donuts, preheat the oven to 325F and grease a 12-cavity donut pan. (If you only have a 6 cavity pan, you will need to work in batches)
In a blender, combine the sour cream, eggs, sweetener, and vanilla extract. Pulse to combine.
Add the almond flour, baking powder, spices, and salt and blend until well combined. If your batter is very thick, add water until it thins out. It should be scoopable but not pourable.
Spoon the batter into the donut cavity to about 3/4 full. Bake about 20 minutes, until golden brown and just firm to the touch. Remove and let cool in the pan 10 minutes, then flip out onto a wire rack to cool completely.
For the coating, in a small bowl combine the sweetener and cinnamon. Brush the top of each donut with melted butter and then sprinkle with the sweetener mixture.
1 servings
Makes about 12 donuts, depending on the size of your donut pan.
* The % Daily Value (DV) tells you how much a nutrient in a serving of food contributes to a daily diet. 2,000 calories a day is used for general nutrition advice.