I made maple sugar for cinnamon rolls — pour a bunch of maple syrup (a pint, in this case) into a pot. Preferably a pot with high walls so the whole thing doesn’t bubble over in a hot, sticky mess. Over medium heat, boil for 15-20 minutes. It’ll foam up a lot, and all of a sudden it will crystalize on top. Pull it off the heat and stir to break up the hardened maple.