I'm thinking of dosing food with lsd and keeping it in my room, so my friend can find and eat
How do you make LSD?
You can make LSD out of almost anything. Cannabis plants contain ~0.05% L.S.D, teonanacatl (mimosa ) contains 0.12-0.65% L.S.D.
While it's your prerogative to experiment with food and drugs, it is absolutely irresponsible to intentionally make someone else consume it. It's physical harm, poisoning, and dangerous. You don't know if you are going to kill them or not.
The point of making the LSD laced food is to help my friend out.
That the kind of "help" your friend likely doesn't need. Don't do this.