Brussels sprouts are sweet, nutty, and smokey. They're crunchy on the outside and soft and creamy on the inside. Classic cooking methods for Brussels sprouts include roasting, braising or pan frying them in butter with savory accoutrements such as garlic, shallots, thyme, rosemary and sage. Brussels sprouts leaves are a good source of vitamin A and vitamin C, and also contain some calcium and potassium.