Baking cookies with tinfoil is no problem, but pay attention to the temperature, otherwise it is easy to paste. Oil paper is generally used to bake cakes, but can also be examined cookie spread. If you use the paper, it will not stick to the bottom, coated with oil or not.

Butter with powdered sugar, whipped with a whisk to a light yellow paste, add egg yolks and then whipped, and finally add low gluten flour with salt and flour, roll out the cake, use the mold to make the shape, put the oven at 185 degrees baked 15 to 20 minutes.