In a medium bowl, whisk together eggs, almond milk, Greek yogurt, avocado oil, coconut sugar, maple extract, baking powder, and protein powder. Whisk until no clumps remain.
Grease a donut pan, and fill 12 donut molds about 3/4 full of batter (it's okay to be messy!). Bake in the preheated oven for 10-12 minutes, until just beginning to turn golden on the edges
Once the donuts have cooled, dip the donuts in the glaze so the top half of each donut is covered. Shake the excess off, and set on a cooling rack. Allow the glaze to harden, then eat!