Tip: Leave a gap between the balls of dough on the baking tray as when they cook they will expand. Let the cookies cool from the oven for at least 10 minutes before removing from the tray or they will fall apart. I left mine on a rack by an open window. Use a non stick tray or parchment paper. Let the butter warm to room temperature before creaming with the sugar. It's more work when straight from the fridge. Makes 8 large or 16 smaller cookies. If you make 16 smaller cookies take 5 minutes off the cooking time.