If you’re drinking a morning coffee you’ll be getting 100-200mg of caffeine. But even a small amount of caffeine will take almost all the edge off withdrawal and prevent headaches. A 75g dark chocolate bar at 70% will give you 20-25mg of caffeine. Costco sells boxes of Lindt chocolate bars that meet this criteria. Eat one in the morning instead of coffee (the sugar and theobromine seems to help as well). Once you’ve done this for a week it’s easy to just stop because most people won’t get withdrawal symptoms from 20mg.