Bake this irresistible Birthday Peanut Butter Brownies at home. Made with Brownie Mix, Water, Milk and Vanilla. Easy step-by-step instructions included.
This Birthday Peanut Butter Brownies relies on simple, everyday ingredients such as cold milk, creamy peanut butter, powdered sugar and cool whip (un-thawed). It comes together quickly and makes 4 servings, at about 1207 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 Birthday Peanut Butter Brownies 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