Finnish_cuisine The cuisine of Finland is notable for the use of wholemeal products (rye, barley, oats) and berries (such as blueberries, lingonberries, cloudberries, and sea buckthorn). Milk and its derivatives like buttermilk are commonly used as food, drink or in various recipes. Various turnips were common in traditional cooking, but were substituted by the potato after its introduction in the 18th century.