Combine the dry ingredients. In a medium mixing bowl, whisk together the almond flour, whey protein powder, coconut flour, cream of tartar, baking soda, konjac powder, guar gum, salt, and stevia. Mix thoroughly to distribute the gums evenly and prevent clumping.
Mix the wet ingredients. In a separate bowl, whisk the eggs until slightly frothy. Add the almond milk, melted butter, vanilla extract, and apple cider vinegar. Whisk until well combined.
Prepare the batter. Gradually pour the wet ingredients into the dry ingredients, stirring gently until smooth. Avoid excessive mixing.
Rest the batter. Allow the batter to stand for 5–8 minutes so the coconut flour, konjac, and guar gum can absorb moisture and thicken the mixture. Stir gently. If the batter becomes too thick, add additional almond milk, 1 tablespoon at a time, until thick but pourable.
Heat the griddle. Preheat a nonstick skillet or griddle to approximately 300–325°F (medium-low heat). Lightly grease with butter or avocado oil.
Cook the pancakes. Pour approximately 3 tablespoons of batter onto the heated griddle for each pancake, gently spreading into circles approximately 3–4 inches in diameter. Cook for 2–3 minutes, until the edges are set and the undersides are golden brown.
Flip and finish. Carefully turn the pancakes with a thin spatula. Cook for another 1–2 minutes, until golden on both sides and cooked through.
Serve warm. Transfer the pancakes to serving plates and top with butter, fresh berries, stevia-sweetened whipped cream, or your favorite sugar-free syrup.