Have a mix but no eggs? No problem! You can use a flax egg (1 tbsp ground flax + 3 tbsp water) or a mashed banana. The banana will make them a bit more cake-like, but it’s still a cookie. It’s breakfast. It’s a victory. You win again, cookie mix.
Running low on butter? Applesauce can work in a pinch for half the fat. It won’t be as rich, but it’ll still be a cookie. And a cookie is always better than no cookie. That’s just math. Cookie math.