All you need is five ingredients to make these Jiffy Mix Peanut Butter Cookies!
Preheat oven to 350 degrees. Grease or line a baking sheet with parchment paper.
Combine cake mix, butter, peanut butter, egg, and vanilla in a large mixing bowl. Mix until a cookie dough is formed.
Use a cookie scoop to drop cookie dough onto the baking sheet, one inch apart.
Press each cookie with a fork in a criss-cross pattern.
Bake for 10-12 minutes.
Let cookies cool for 5-10 minutes before moving them to a cooling rack.
Serve.