Scary skulls shortbread cookies

Ingredients

Enriched wheat flour (wheat flour, malted barley flour, niacin, reduced iron, thiamine mononitrate, riboflavin, folic acid), butter (cream salt, annatto), cane sugar, sanding sugar, eggs, powdered cane sugar (sugar, corn starch), water, egg whites, pure vanilla extract (water, ethyl alcohol (35%), vanilla beans), natural black color (caramel color, vegetable juice).