Mix everything in a bowl until homogeneous. You don't need to beat the egg whites, just mix them in (it's a question I get often).
Place a silpat or baking paper on a baking tray. If you're using baking paper it's best to rub a bit of vegetable oil on top of it just to make sure the cookies won't stick.
Put a 10cm diameter cookie cutter over the baking paper or silpat and pout a tablespoon of mix inside.
Press the mix down using the back of a spoon to flatten it as much as possible, leaving no empty spots. Then lift the cookie cuter and repeat the process with the next cookies until the tray is full.
Take to a preheated oven at 140C for 25-30min or until really golden.
Let cool completely before removing them from the tray as they are really soft while hot.