These Lunch Lady Peanut Butter Bars are a nostalgic treat reminiscent of school cafeteria desserts. A buttery oat base topped with creamy peanut butter and rich chocolate frosting, these bars are perfect for any peanut butter lover.
Author:nadia
Prep Time:20 minutes
Cook Time:20 minutes
Total Time:40 minutes
Yield:24 bars 1x
Category:Dessert
Method:Baking
Cuisine:American
Diet:Vegetarian
Ingredients
UnitsScale
For the Bars:
1cup unsalted butter, softened
1cup creamy peanut butter
1cup granulated sugar
1cup packed light brown sugar
2 large eggs
1 teaspoon vanilla extract
2cups all-purpose flour
1 teaspoon baking soda
1/2 teaspoon salt
2cups quick oats
For the Topping:
1 1/2cups creamy peanut butter
2cups powdered sugar
1/4cup milk
1/2 teaspoon vanilla extract
1/4cup unsalted butter, melted
1/4cup cocoa powder
Instructions
Preheat and Prepare: Preheat oven to 350°F. Grease a 13×18-inch baking sheet.
Mix Wet Ingredients: In a large bowl, cream together softened butter, 1 cup peanut butter, granulated sugar, and brown sugar. Add eggs and vanilla, mix well.
Combine Dry Ingredients: In a separate bowl, whisk flour, baking soda, and salt. Gradually add to wet mixture. Stir in oats.
Bake: Spread dough in prepared pan. Bake for 18–22 minutes until golden.
Add Peanut Butter: Spread 1 1/2 cups of peanut butter over warm bars. Let it melt as bars cool.
Make Frosting: Mix powdered sugar, milk, vanilla, melted butter, and cocoa until smooth.
Finish Bars: Spread frosting over peanut butter layer. Cool completely before slicing.
Notes
Bars can be refrigerated for a firmer texture.
Try using crunchy peanut butter or drizzle with melted chocolate for variation.