You should distinguish your pot brownies from regular brownies.
Phil makes a pan of pot brownies for a party with friends and a pan of regular brownies for a work event.
Phil wants to make sure he takes the right brownies to the right event.
Phil bakes the pot brownies in a metal pan and the regular ones in a glass pan.
Phil samples brownies from both pans to identify the non-pot pan before work.
Phil is easily able to identify the right brownies for each occasion.
Phil goes to work high from the brownie he sampled.