So great when you have a sudden craving! Easy peanut butter cookie recipe - no flour, just 3 ingredients: 1 Cup Peanut Butter, 1 Cup Sugar, 1 Egg, (opt: sugar for rolling cookies.) Mix the 3 ingredients together. Roll 1 tbsp of cookie dough into a ball. Roll in sugar if desired. Place dough balls on ungreased cookie sheet. Pat down with fork. Bake at 350 (must be preheated) for 8 minutes. Do NOT cook longer, they may look underdone but will be perfect when cooled (otherwise they get hard).