Old-School Peanut Butter Cookie Bars (Lunch Lady Style)

Old-School Peanut Butter Cookie Bars (Lunch Lady Style)
There’s something timeless about classic cafeteria desserts—simple to make, big on flavor, and crafted to feed a crowd. These Peanut Butter Cookie Bars are a modern spin on those nostalgic lunch lady treats, and they’re every bit as crave-worthy.

Unlike cookies that require scooping and chilling, these bars are baked in a single sheet pan. No fuss, no waiting—just spread the batter and bake. The end result? Buttery, peanut-butter-packed bars with a soft, almost brownie-like texture that melts in your mouth.

And then comes the glaze. A warm, creamy peanut butter frosting is poured over the cooled bars, soaking in just enough to create a rich, sweet top layer that sets beautifully. These bars disappear fast—especially if friends or family catch wind of them.

Why You’ll Love This Recipe

One pan, zero hassle – Quick to make and easy to clean up.
Double peanut butter punch – It’s in the base and the glaze.
Sweet meets salty – A flavor duo that never fails.
Great for gatherings – Yields up to two dozen servings.
Even better the next day – The texture softens, the flavors deepen.

Baking Tips

Use parchment paper for easy lifting and clean edges.
Cool completely before frosting—this ensures a smooth, glossy glaze.
Switch it up by adding chocolate chips, using a chocolate glaze, or topping with chopped peanuts.