Fallout 76 cooking is possible using dedicated cooking stations.
Cooking is one of the staples of survival in the game. While ready-made chems like stimpaks provide healing on par with foods, cooked foods and drinks can provide a broad variety of miscellaneous bonuses. Each type of ingredient can have three states: Raw, simple processed, and complex processed (usually denoted by the moniker tasty or similar). Basic cooking recipes are unlocked when first collecting a given ingredient, while advanced have to be learned by collecting them from quests, buying them from vendors, or finding them in the wild.
Notably, there is no penalty at all for cooking ingredients: Doing so increases their value, removes the chances for disease, and greatly increases their nutritional value. Frequently visiting cooking stations is highly recommended.