Whisk the wet ingredients: In a medium bowl, whisk eggs, almond milk, vanilla, and melted butter until smooth.
Add the dry ingredients: Stir in almond flour, protein powder, sweetener, baking powder, and salt. Mix until just combined.
The batter should be thick but pourable. If too thick, add 1–2 tablespoons more milk.
Rest the batter: Let it sit for 3–4 minutes to hydrate the almond flour and reduce grittiness.
Heat the pan: Warm a nonstick skillet or griddle over medium heat. Lightly grease with butter or oil.
Keep heat moderate to prevent over-browning.
Cook the pancakes: Scoop about 1/4 cup batter per pancake. Spread gently with the back of a spoon. Cook 2–3 minutes until the edges look set and small bubbles form.
Flip carefully: Slide a thin spatula underneath and flip.
Cook 1–2 more minutes until golden and cooked through.
Serve warm: Top with butter, sugar-free maple syrup, a spoon of Greek-style keto yogurt, or a handful of berries.