Preheat the oven to 350 Fahrenheit and line a baking sheet with parchment paper.
In a mixing bowl, whisk together the eggs, almond butter, sugar and vanilla until combined.
Fold in the protein powder, baking soda, cream of tartar, cinnamon and salt. The dough will be fairly sticky.
In a small dish, whisk the sugar and cinnamon.
Generously spray a cookie scoop with oil and lightly spray your hands. Seems odd, but really helps with the sticky dough! if it's still too sticky, you can add in a tablespoon extra of protein powder or let the dough sit for a few minutes.
Scoop the dough, roll in the cinnamon sugar and place on the baking sheet.
Keep enough space between each for spreading. Bake for 9-11 minutes, 10 is usually perfect in my oven but all ovens are different.
I like to take a round cookie cutter to swivel around the edges to create perfect circles.
Let cool, then enjoy!