Favorite Peanut Butter Cookies

• 1 egg
• 1 preheat oven
• 1 level dough ball (into)
• 240 gr rice chex brand cereal
• 150 gr sugar
• 110 gr peanut butter
• 65 gr all purpose flour
• 55 gr margarine
• 2 gr baking powder
• 1 gr salt