Round tin

Apply a thin layer of butter with a folded sheet of paper towel and divide it nicely around the edge of the baking tin. Apply a layer of baking paper to the bottom of the baking tin: trace around the tin onto the baking paper, then cut out the circle. Stick the baking paper to the butter so that the paper stays in place. Dust the lined tin with flour, hold the tin above your workbench or sink and tap on the bottom to remove the excess flour.