Everybody saw at least one bake sale when they went to college. These events exploited the human inability to pass up delicious sweet treats. It’s also great for home chefs to make a few extra dollars on the side. Create a social media account and start baking something now (via High-Speed Training).
Specialize in one or two particular items like cupcakes or cinnamon rolls. If they’re good, people will talk about them and recommend them to their friends. However, check the local legal requirements first to avoid trouble. Remember, many jurisdictions require kitchen inspections and a bunch of other irritating rules.