In a food processor, blend grahram crackers until you have a fine crumbs consistency.
Add in dairy free milk and almond butter (if using any). Pulse again until well combined.
If the mixture appears to be too crumbly and not sticky when you press it with your fingers, add 1 additional tablespoon of milk at a time until the mixture is no longer sand-like.
Pour the mixture into a baking dish you plan to use.
Press down firmly. Make sure you get all the corners and edges pressed well. There should not be crumbs falling out.