Gather all your ingredients on the counter to streamline the process.
In a mixing bowl, combine the fresh lemon juice, honey, and the large egg. Whisk until well blended. Add the vanilla protein powder, coconut flour, coconut sugar, baking powder, and a pinch of salt. Mix until combined.
Gradually add 3 to 5 tablespoons of unsweetened vanilla almond milk until the batter is pourable but not too runny.
Gently fold in the lemon zest and fresh blueberries, being careful not to overmix.
Preheat your waffle iron according to the manufacturer’s instructions.
Lightly grease the waffle iron (if necessary) and pour in enough batter to cover the surface. Close the lid and cook according to your waffle iron’s instructions, about 3-5 minutes.
Carefully remove the waffles from the iron and serve immediately with your favorite toppings.