Peanut Butter Lunch Lady Bars

Why You’ll Love This Recipe

• Simple Preparation: No need for scooping or rolling dough; just spread the batter in a pan and bake.

• Rich Peanut Butter Flavor: Both the base and frosting are loaded with creamy peanut butter.

• Perfect for Sharing: Yields 16–24 bars, making it ideal for gatherings.

• Make-Ahead Friendly: The flavor and texture improve the next day.

• Versatile: Easily adaptable with different toppings or frostings.

Ingredients

(Tip: You'll find the full list of ingredients and measurements in the recipe card below.)

For the Bars:

• 2 cups all-purpose flour

• 2 cups granulated sugar

• 1 teaspoon baking soda

• 1 teaspoon salt

• ½ cup whole milk

• 1 teaspoon vanilla extract

• 2 large eggs, beaten

• 1 cup (2 sticks) unsalted butter

• 1 cup creamy peanut butter

For the Frosting:

• ½ cup (1 stick) unsalted butter

• ½ cup creamy peanut butter

• 2 tablespoons milk

• 4 cups powdered sugar

Directions

1. Preheat the oven to 400°F (200°C). Grease a large sheet pan (approximately 13×18 inches) or line it with parchment paper.

2. In a large bowl, whisk together the flour, sugar, baking soda, and salt. Set aside.

3. In a separate bowl, combine the milk, vanilla extract, and beaten eggs.

4. In a medium saucepan, melt the butter and peanut butter over medium heat until it reaches a gentle boil. Remove from heat.

5. Gradually stir the dry ingredients into the melted peanut butter mixture. Then add the milk and egg mixture, stirring until smooth and well combined.

6. Spread the batter evenly into the prepared pan. Bake for 20 minutes or until a toothpick inserted into the center comes out clean. Allow to cool completely in the pan.

7. For the frosting, melt the butter and peanut butter in a small saucepan over medium heat until it just begins to boil. Remove from heat and stir in the milk. Gradually mix in the powdered sugar until smooth.

8. Pour the warm frosting over the cooled bars and spread evenly. Let it cool at room temperature until the frosting sets.

Servings and Timing

• Yield: 16–24 bars

• Prep Time: 15 minutes

• Cook Time: 20 minutes

• Total Time: Approximately 1 hour (including cooling and frosting)

Variations

• Chocolate Frosting: Replace the peanut butter frosting with a chocolate glaze for a classic flavor combination.

• Add-Ins: Incorporate chopped nuts or chocolate chips into the batter for added texture.

• Toppings: Sprinkle chopped peanuts or a drizzle of melted chocolate over the frosting for extra flair.

Storage/Reheating

• Room Temperature: Store in an airtight container for up to 3 days.

• Refrigerator: Keep refrigerated for up to a week. Bring to room temperature before serving.

• Freezer: Wrap tightly and freeze for up to 2 months. Thaw overnight in the refrigerator before serving.

FAQs

How do I prevent the frosting from melting into the bars?

Ensure the bars are completely cooled before applying the warm frosting. This helps maintain a distinct frosting layer.

Can I use natural peanut butter?

Natural peanut butter can be used, but it may alter the texture and sweetness. Stir well before using to incorporate the oils.

What type of pan should I use?

A large sheet pan, approximately 13×18 inches, is ideal for this recipe to achieve the correct thickness and texture.

Can I halve the recipe?

Yes, halve the ingredients and use a smaller pan, such as a 9×13-inch baking dish.

How do I know when the bars are done baking?

Insert a toothpick into the center; if it comes out clean, the bars are done.

Can I make these bars ahead of time?

Absolutely. These bars can be made a day in advance; the flavors often improve after resting.

How should I store leftovers?

Store in an airtight container at room temperature for up to 3 days or refrigerate for up to a week.

Can I freeze these bars?

Yes, wrap them tightly and freeze for up to 2 months. Thaw in the refrigerator overnight before serving.

What can I use instead of whole milk?

You can substitute with other types of milk, such as 2%, skim, or plant-based alternatives, though it may slightly affect the texture.

Is it necessary to use parchment paper?

While not mandatory, using parchment paper makes it easier to remove the bars from the pan and ensures clean edges.

Conclusion

Peanut Butter Lunch Lady Bars are a delightful treat that combines simplicity with rich flavor. Perfect for gatherings or a sweet indulgence at home, these bars are sure to become a favorite in your dessert repertoire.

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