Lunch Lady Peanut Butter Bars Recipe: A Dense and Chewy School Cafeteria Classic

Lunch Lady Peanut Butter Bars

These Lunch Lady Peanut Butter Bars are rich, dense, and delicious, and they bring back school day memories in the very best way. If your school never served them, you are in for a real treat. They taste just like the ones from the lunch line, and if I am honest, they might taste even better than you remember.

A friend of mine named Karin stopped by one afternoon while a pan was cooling on my counter. I offered her one with a cup of coffee. You should have seen the look on her face.

Through a very large bite she told me they tasted exactly like the ones from school, and then she asked if she could take the rest home. She left with the pan wrapped in foil and a smile that said it all.

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That is the magic of these bars. One bite and you are back in the cafeteria line with a plastic tray, hoping the lunch lady hands you the corner piece with the most glaze.

What sets these apart from a soft peanut butter cookie is the texture. They are dense and chewy through the middle with slightly crisp edges, and the glaze on top stays soft. They hold their shape when you cut them, which is exactly what you want when you are carrying a pan to a potluck or a bake sale.

The recipe makes 16 bars and takes about 50 minutes from start to finish, with 15 minutes of prep and 35 minutes in the oven. The glaze is thin, peanutty, and just sweet enough. Let me walk you through it step by step.

Good To Know

Here is a little background that makes these bars even more special. Schools once received large amounts of peanut butter as a commodity, and that is exactly why so many cafeterias started baking peanut butter bars in the first place.

The original version had no chocolate layer on top, simply because chocolate was not a commodity. Later, oatmeal was added to the batter to stretch it when peanut butter became less readily available. So the bars you remember were built from whatever the kitchen had on hand, and they turned out perfect anyway.

Ingredients

Before you start pulling things out of the pantry, let me clear up a few things that really do change the finished bars.

For the bars:

• 1 cup unsalted butter
• 1 1/2 cups peanut butter, creamy or crunchy
• 1 1/2 cups granulated sugar
• 1/2 cup brown sugar
• 1 teaspoon salt
• 4 large eggs, room temperature
• 2 teaspoons pure vanilla extract
• 2 cups all purpose flour, spooned and leveled

For the glaze:

• 1/4 cup peanut butter
• 1 teaspoon pure vanilla extract
• 2 1/2 to 3 tablespoons milk
• 1 cup powdered sugar

Use all purpose flour, not cake flour. Cake flour gives you a lighter, more delicate crumb, and these bars are supposed to be thick and dense. That texture is the whole point.

Use unsalted butter if you can. If salted butter is all you have, go right ahead and use it, but cut the salt in the recipe down to half a teaspoon so the bars do not turn out too salty.

The peanut butter can be creamy or crunchy, whichever you love. Organic natural peanut butter works beautifully too, but you must stir it well in the jar before you measure. The oil rises to the top and needs to be blended back in, otherwise your batter will be dry in spots.

Four large eggs give these bars their richness and structure, and room temperature eggs blend into the sugars much more smoothly than cold ones. Light brown sugar brings moistness and chew, and pure vanilla extract makes any baked good taste a little more like home.

About that salt. One teaspoon sounds like a lot for a dessert, but it is doing real work here. It keeps the bars from tasting flat and balances all that sweetness.

For the glaze, add only as much milk as you need to reach a thin, pourable consistency. This is meant to be a glaze, not an icing, so go easy on it. If you want something thicker and more like icing, use less milk. And if your powdered sugar is lumpy, sift it right into the pan.

How to make

This recipe comes together in two easy parts, the bars and the glaze. Preheat your oven to 350 degrees F and grease a 9 x 13 inch cake pan or sheet pan. I usually rub mine down with a leftover butter wrapper, which works like a charm.

You will need a medium saucepan, a large mixing bowl, and that 9 x 13 inch pan. That is really it. The batter is mixed by hand, so there is no stand mixer to drag out and nothing to chill before baking.

The bars

1. Melt 1 cup of butter in a medium saucepan over medium low heat. Add 1 1/2 cups peanut butter and stir so the peanut butter melts into the butter. Mix until well combined, then remove from the heat and set it aside.
2. In a large mixing bowl, combine 1 1/2 cups granulated sugar, 1/2 cup brown sugar, and 1 teaspoon salt. Mix until everything is combined and make sure there are no lumps left in the brown sugar.
3. Add the 4 eggs one at a time, mixing well after each one. Then mix in 2 teaspoons vanilla.
4. Add 2 cups all purpose flour and mix just long enough to incorporate it. Do not over mix here. Over mixing makes the bars tough instead of chewy.
5. Pour in the melted butter and peanut butter mixture and mix until well combined.
6. Spread the batter evenly in the prepared pan. It is thick, so take a minute and use a spatula to work it into the corners.
7. Bake for 30 to 35 minutes, until a toothpick inserted in the center comes out with just slight crumbs on it. Do not over bake.
8. Let the bars cool in the pan until just warm. You want to glaze them while they are slightly warm but not hot, so make the glaze while they cool.

The glaze

1. Add 1/4 cup peanut butter, 1 teaspoon vanilla, and about 2 tablespoons of the milk to a small saucepan over medium heat. Stir until the peanut butter melts, then remove the pan from the heat.
2. Add 1 cup powdered sugar. If it is lumpy, sift it in. Then add the remaining milk as needed. This is supposed to be a thin glaze, so do not make it too thick. I usually end up using about 3 tablespoons of milk in total. Mix well.
3. Spread the glaze thinly over the top of the warm bars. Let it set for a few minutes if you want neat looking cuts. Otherwise, go ahead and cut and enjoy. These are so good warm.
4. Cut them into 12 large bars, or if you are taking them to a party where there will be other sweets, cut them in half again for 24 bars. They are pretty rich.
5. Tightly covered leftovers keep well for up to 3 days on the counter.

Tips

Want a thicker glaze that sits more like icing? Add more powdered sugar until it is as thick as you like, and consider doubling the whole glaze recipe. It is meant to be thin and it does not make a lot, so doubling is a smart move if you like a generous layer on top.

You will see some modern versions of this recipe with baking soda added. The original used no leaveners at all, neither baking powder nor baking soda. These bars are not supposed to rise. They are supposed to be thick and dense, and that is exactly what makes them taste like the cafeteria version.

If you are using organic peanut butter, stir it in the jar before you spoon it into the measuring cup. The oil on top needs to be blended in, otherwise the first scoop will be dry and the last scoop will be greasy.

Pull the bars out when the toothpick has just a few crumbs on it. A couple of extra minutes in the oven and you lose that chewy middle that makes them so good.

A few more things I have learned along the way.

• Do not over mix once the flour goes in.
• Pull the bars from the oven at the first sign of slight crumbs.
• Glaze while the bars are warm, not hot, so the glaze spreads without melting away.
• Let the glaze set a few minutes before cutting for clean edges.
• Store tightly covered at room temperature for up to 3 days.

For serving, these are wonderful with a cold glass of milk, a hot cup of coffee, or a scoop of vanilla ice cream if you want to go all out. They travel well and they hold up at room temperature, which makes them a favorite at bake sales and potlucks.

If you want to get ahead, bake and glaze the bars the day before you need them. They keep well tightly covered, so there is no rush on the morning of your gathering.

These bars are rich, so a small square goes a long way. I like to cut a pan into 16 pieces for everyday snacking and 24 smaller ones when there is a table full of other desserts. Either way, they disappear fast.

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Lunch Lady Peanut Butter Bars

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Lunch Lady Peanut Butter Bars These Lunch Lady Peanut Butter Bars are rich, dense, and delicious, and they bring back school day memories in the very best way. If your school never served them, you are in for a real treat.

• Total Time: 50 min
• Yield: 16 bars 1x

Ingredients

Scale 1x2x3x

BARS
1 cup butter, unsalted
1 1/2 cups peanut butter, creamy or crunchy
1 1/2 cups granulated sugar
1/2 cup brown sugar
1 teaspoon salt
4 large eggs, room temperature
2 teaspoons pure vanilla extract
2 cups all-purpose flour, spooned and leveled

GLAZE
1/4 cup peanut butter
1 teaspoon pure vanilla extract
2 1/2 to 3 tablespoons milk
1 cup powdered sugar

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Instructions

BARS
1-Preheat oven to 350 degrees: Preheat oven to 350 degrees. Grease a 9 x 13 cake or sheet pan, and set aside. I use one of my butter wrappers to grease the pan.
2-Melt the butter in a medium saucepan: Melt the butter in a medium saucepan over medium-low heat. Add the peanut butter. Stir and allow the peanut butter to melt into the butter. Mix until well combined, remove from heat, and set aside.
3-To a large mixing bowl, add the: To a large mixing bowl, add the granulated sugar, brown sugar and salt. Mix until combined, making sure there are no lumps in the brown sugar.
4-Add the eggs, one at a time,: Add the eggs, one at a time, mixing well after each one. Mix in the vanilla. Add the flour, mixing just long enough to incorporate the flour. Don’t over mix. Add the melted butter/peanut butter mixture. Mix until well combined.
5-Spread the batter evenly in the prepared: Spread the batter evenly in the prepared pan. Bake for 30 to 35 minutes or until a toothpick comes out with just slight crumbs on it. Don’t over bake. Allow to cool in pan until just warm. You want to spread the glaze on them while they are slightly warm but not hot. Make the glaze while they are cooling.

GLAZE
6-Add the peanut butter, vanilla and about: Add the peanut butter, vanilla and about 2 tablespoon of the milk to a small saucepan over medium heat. Stir until the peanut butter melts. Remove from heat. Add the powdered sugar, (if it’s lumpy, I sift it in). Then add the remaining milk as needed. This is suppose to be a thin glaze, so don’t make it too thick. I usually use about 3 tablespoons of milk. Mix well. Spread thinly over the top of the warm bars, and allow to set for a few minutes for neat looking cuts. Otherwise, go ahead and cut and enjoy! These are so good warm.
7-Cut them into 12 large bars or: Cut them into 12 large bars or if you’re taking them to a party where there will be other sweets, you can cut them in half again, making 24 bars. They are pretty rich.
8-Tightly covered leftovers will keep well for: Tightly covered leftovers will keep well for up to 3 days on a counter.

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• Prep Time: 15 min
• Cook Time: 35 min
• Method: Bake