As it would turn out, you can't give the recipe to make meth in games, so the recipe you cook is actually the ingredients used to make table salt
NaOH + HCl → NaCl + H2O
Or salt water I guess
Reddit Link as well

Here's a mod that retextures the Meth to be Salt

Optional file renames Meth to Salt

Unzip "Meth_to_tableSalt.zip", place main folder in Assets/mod_overrides
Unzip "Rename Meth to Salt.zip", place main folder in PAYDAY2/mods

Old Texture