Oat biscuits

2. Butter a 20cm/8in loose-bottomed cake tin. Tip the mixture in. Press out to the sides of the tin with the fingertips to give an even thin layer. Mark into 12 triangles with a sharp knife (this makes it easy to break the cake into biscuits when cooked). Bake at Gas 6/400F/200C for around 15 minutes, or until browning at the edges of the tin.

3. Remove from oven and leave to cool in the tin. The biscuit crispens as it cools. Remove base from the cake tin and separate biscuits along the lines of the knife marks.