Begin by preheating your waffle iron to medium heat.
Next, in a large bowl, mix together eggs, almond milk, and vanilla. Then, add in flour, protein powder, baking powder, and baking soda. Mix until combined.
Finally, add in melted coconut oil and mix again.
Once waffle maker is completely heated, lightly spray with non-stick cooking spray (I use coconut oil cooking spray) on both sides. Then, pour about ½ cup of batter onto waffle maker, close, and flip. Let cook for about 1 and ½ to 2 minutes. Flip waffle maker and open. If it needs a little be more time to cook, close and flip over, let cook for about 20-30 seconds longer.
Use non-stick tongs to remove waffle from iron.