For the lightest texture use finely blanched almond flour and avoid overbaking so the donut holes stay soft inside. If you prefer a powdered coating, pulse the erythritol for the coating in a blender until fine before mixing with cinnamon. Different erythritol blends vary in sweetness, so adjust the sweetener slightly to taste while keeping the coating dry and free of added liquid to maintain a classic donut sugar texture. To reheat from room temperature, warm the donut holes briefly in a low oven until just soft, or enjoy them as is alongside coffee or tea.