🍳DailyRecipes
Dessert

Classic Lunch Lady Peanut Butter Bars

These soft and chewy bars are topped with a creamy peanut butter layer and a rich chocolate frosting that everyone loves.

By Daily Recipes Book· 🌍 American· July 16, 2026
Classic Lunch Lady Peanut Butter Bars
dailyrecipesbook.com
Prep
15 minutes
Cook
25 minutes
Total
40 minutes
Serves
24

If you grew up eating these in the school cafeteria, you know exactly why they are a favorite. They have that perfect balance of a chewy, cookie like base and a smooth, sweet topping that makes them hard to resist.

My best tip for these is to let the chocolate layer set completely before you try to slice them. If you are in a rush, pop the pan in the fridge for about twenty minutes to help the process along.

Ingredients

  • 1 cup butter, softened
  • 1 cup granulated sugar
  • 1 cup brown sugar, packed
  • 2 large eggs
  • 1 teaspoon vanilla extract
  • 1 cup creamy peanut butter
  • 2 cups all purpose flour
  • 1 teaspoon baking soda
  • 1/2 teaspoon salt
  • 2 cups quick oats
  • 1/2 cup butter, for the frosting
  • 1/2 cup creamy peanut butter, for the frosting
  • 1/3 cup cocoa powder
  • 1/4 cup milk
  • 3 cups powdered sugar
  • 1 teaspoon vanilla extract

Instructions

  1. 1

    Preheat your oven to 350 degrees Fahrenheit and lightly grease a 9 by 13 inch baking pan.

  2. 2

    Cream the softened butter, granulated sugar, and brown sugar together in a large bowl until smooth.

  3. 3

    Beat in the eggs, vanilla, and the first cup of peanut butter until well combined.

  4. 4

    Stir in the flour, baking soda, salt, and oats until a soft dough forms.

  5. 5

    Spread the dough evenly into your prepared baking pan.

  6. 6

    Bake for 20 to 25 minutes or until the edges are just lightly golden brown.

  7. 7

    While the base cools slightly, prepare the frosting by melting the butter, peanut butter, cocoa powder, and milk in a saucepan over medium heat.

  8. 8

    Remove from heat and whisk in the powdered sugar and vanilla until the frosting is smooth.

  9. 9

    Pour the warm frosting over the warm cookie bars and spread it to the edges.

  10. 10

    Let the bars cool completely at room temperature before cutting them into squares.

💡 Tips

Store these bars in an airtight container at room temperature for up to four days. You can also freeze them for up to three months if you want to save some for later. These are perfect for bake sales or parties since they hold up so well.

#dessert#peanut butter#chocolate#sweets#bars

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