First, gently heat the butter, sugar and syrup together in a small saucepan until the sugar has dissolved. Meanwhile sift the flour into a bowl, then stir in the oats, the chopped and powdered ginger and salt.
Now pour the melted mixture in and mix very thoroughly. Divide the mixture into four, and then divide each quarter into three and mould each piece into a little round with your hand.
Place them on the baking sheet, spacing them out well so that they have plenty of room to expand (which they will). Now press each one to flatten a little bit, then bake them near the centre of the oven for about 20–22 minutes, or until they’ve turned a lovely golden brown.
Leave them on the baking sheet for 15 minutes, then transfer them to a wire cooling tray to finish cooling.
Store them in an airtight tin to keep really crisp.