Crumble graham crackers, press it into greased pie dish, set in the fridge and use for the crust.
Crush shortbread cookies and use it to make a sweet crust for key lime pie.
Combine almond flour, coconut oil, and honey to make a nutty crust.
Use crushed ginger snap cookies to give key lime pie a spicy contrast with the crust.
Combine your favorite cereals to make a healthy and delicious crust for the pie.