This is a small recipe , can be easily doubled or tripled for 40 and 60 cookies. You will probably need a double recipe for a medium sized Tiramisu and a triple for a larger one.
If you have a small oven or small baking sheets , you can bake in shifts. The batter holds up fine.
Stored in an airtight container, they can be kept for 10 days or longer.
You know your egg whites are whipped enough when you lift the beaters and the peaks stay upright. If you turn over the bowl, the whipped whites wont move.