In English butchery, the topside is a primal beef cut located on the inner side of the rear leg, situated above the knee and below the rump.
Due to its position on the cow, it's part of a muscle group that does some work but not as much as the front legs or shoulders. As a result, the topside strikes a balance between tenderness and flavor. Topside is characterized by its lean nature, with minimal fat marbling, but a thin layer of fat covers its outer side.
Given its lean texture, the topside is particularly well-suited for roasting. In traditional English meals, the topside roast is a classic choice for Sunday dinners. When roasted, it's crucial to avoid overcooking to preserve its natural tenderness.
Many cooks will sear the joint at a high temperature initially and then reduce the heat to let it cook slowly. This method, combined with regular basting, ensures a juicy result. Once cooked, the topside is often sliced thinly and is best if served medium-rare to medium.