In a medium bowl combine the almond flour, sugar, baking powder, nutmeg, and collagen peptides.
In a separate bowl, combine the eggs and egg whites. Mix the eggs until they are frothy.
Add the sour cream to the egg mixture and mix it until it's fully combined.
Add the wet ingredients to the dry ingredients and mix until it's fully combined.
Bake the donuts at 350 degrees for 22 to 25 minutes or until they are fully done and golden brown. You can stick a toothpick in the donut and if it comes out clean, it's done.
Place the donuts on a wire rack.
While the donuts are baking, create the glaze.
Melt butter in a small saucepan and add the Swerve and heavy cream.
Simmer over medium heat for 5 minutes, or until slightly thickened.