Start by preheating your oven to 350ºF. Prepare a large baking sheet with parchment paper or a silicone mat for easy cleanup.
In a spacious bowl, gently whisk together the coconut flour, almond flour, baking powder, garlic powder, and salt until well combined.
Fold in 1/2 cup of the delicious shredded Cheddar cheese into the dry mixture.
Now, add the egg whites, whole eggs, creamy sour cream (or healthy Greek yogurt), and melted butter. Stir everything together until a thick, cohesive dough forms.
Using a spoon, drop rounded portions of dough onto your prepared baking sheet, spacing them evenly to create about 10 delightful biscuits.
Generously sprinkle the remaining 1/4 cup of shredded Cheddar cheese over the top of each biscuit for a golden finish.
Bake for 20-23 minutes, or until your biscuits are beautifully golden, firm to the touch, and the cheese is wonderfully melted.
Allow them to cool slightly on the pan before enjoying these warm, comforting treats.