Brush egg bite mold with butter. Make sure to tip the mold upside down. You want to avoid pools of butter at the bottom of the mold.
Mix dry ingredients together in one bowl.
In another bowl whisk wet ingredients together until eggs are fully whisked.
Add dry ingredients into wet and fold together until combined.
Carefully spoon in batter evenly into each mold. Optionally using dampened fingers, smooth the tops of each donut so that when they bake they become as around as possible.
Bake for 12-14 minutes or until golden and a toothpick inserted comes out clean.
Cool for 2 minutes or until you can handle the mold with hands or oven mitts.
Carefully loosen the sides of each donut from the mold and pop them out.
Whisk together sugar and cinnamon. In another bowl have some melted butter ready.
Individually roll each donut in melted butter then immediately toss the buttered donut into cinnamon sugar. Set aside and repeat with remaining donuts.