Peanut Butter Lunch Lady Cookie Bars

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A classic school cafeteria favorite turned into easy-to-make cookie bars. Perfect for bake sales, family gatherings, or just a sweet treat for yourself!
Yield: 24 bars
Ingredients
For the Bars:
- 1 cup (2 sticks) unsalted butter, softened to room temperature
- 1 cup creamy natural peanut butter
- 1 cup granulated sugar
- 1 cup packed light brown sugar
- 2 large eggs, at room temperature
- 1 teaspoon vanilla extract
- 2 1/2 cups all-purpose flour
- 1 teaspoon baking soda
- 1/2 teaspoon salt
For the Frosting:
- 1/2 cup creamy natural peanut butter
- 4 cups powdered sugar, sifted
- 1/4 cup (1/2 stick) unsalted butter, softened
- 1/3 cup whole milk or heavy cream (plus more if needed for consistency)
- 1 teaspoon vanilla extract
Instructions
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Preheat and Prepare:
Preheat your oven to 350°F (175°C). Grease a 9x13-inch baking pan and line it with parchment paper for easy removal.
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Make the Cookie Bar Dough:
- In a large mixing bowl, cream together the butter, peanut butter, granulated sugar, and brown sugar until light and fluffy (about 2–3 minutes).
- Add the eggs one at a time, mixing well after each addition. Stir in the vanilla extract.
- In a separate bowl, whisk together the flour, baking soda, and salt. Gradually add the dry ingredients to the wet ingredients, mixing until just combined.
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Bake the Bars:
Spread the dough evenly into the prepared baking pan. Use a spatula or your hands to press it down evenly.
Bake for 20–25 minutes, or until the edges are lightly golden and a toothpick inserted into the center comes out clean.
Allow the bars to cool completely in the pan before frosting.
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Make the Frosting:
- In a medium mixing bowl, beat together the peanut butter, powdered sugar, butter, and vanilla extract.
- Gradually add the milk or cream, one tablespoon at a time, until the frosting reaches a smooth, spreadable consistency.
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Frost the Bars:
Spread the frosting evenly over the cooled cookie bars. Allow the frosting to set for 20–30 minutes before cutting into bars.
Nutritional Information (Per Bar, Based on 24 Bars):
Calories: 290 | Fat: 15g | Saturated Fat: 7g | Carbohydrates: 34g | Sugar: 26g | Protein: 5g | Fiber: 1g | Sodium: 140mg
Kitchen Tips
- Peanut Butter Choice: For the best results, use creamy natural peanut butter without added sugar or oils.
- Don’t Overbake: To maintain the chewy texture, keep an eye on the bars during baking—slightly underbaked is better than overdone!
- Toppings: Add a sprinkle of crushed peanuts or a drizzle of melted chocolate on top for extra flair.
- Storage: Store in an airtight container at room temperature for up to 4 days, or refrigerate for up to a week.
- Freezing: These bars freeze well. Wrap individually and freeze for up to 2 months. Thaw at room temperature before serving.
Enjoy these decadent and nostalgic Peanut Butter Lunch Lady Cookie Bars—they’re bound to be a crowd-pleaser!