"Create a firmer keto sour cream biscuit recipe based on this formula: coconut flour, whey protein powder, baking powder, garlic powder, salt, chilled butter, sour cream, eggs, and egg white. The user wants biscuits that are less pale, less delicate, and hold together better. Improve structure and browning while keeping it low sugar, keto, and suitable for a 2-person household. Use imperial units and include brief troubleshooting notes on why the original was fragile and how the revised version fixes it."