Bake this irresistible Fudge Filled Peanut Butter Bar Cookies at home. Made with yellow cake mix, peanut butter, butter and eggs. Easy step-by-step inst…
This Fudge Filled Peanut Butter Bar Cookies relies on simple, everyday ingredients such as box yellow cake mix, peanut butter, butter and eggs. It comes together quickly and makes 4 servings, at about 983 kcal each. The step-by-step instructions below are written to be easy to follow, even on a busy day.
Whether you're rounding off a family dinner, bringing a treat to a gathering, or simply satisfying a sweet craving, this Fudge Filled Peanut Butter Bar Cookies delivers. Serve it warm or at room temperature, and add a scoop of ice cream or a spoonful of whipped cream for an extra-special finish.
Updated Jun 30, 2026