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Lunch Lady Brownies in a Sheet Pan

Thanks for sharing!

Make a giant sheet pan filled with frosted lunch lady brownies for a chocolaty treat big enough to feed a crowd. They are easy to make the chocolate icing takes them to the next level of delicious.

Two frosted lunch lady brownies stacked on top of each other with sheet pan of brownies in the background.

When you want a giant batch of frosted chocolate goodness, lunch lady brownies are just the thing. This big batch recipe is perfect for parties and potlucks because it makes plenty of chocolate goodness to share.

One of the best parts of those cafeteria brownies is a nice layer of chocolate frosting, so of course this recipe has that as well.

And both the brownies and the frosting are super simple to make. You can easily cut it onto 36 nice size servings or even more small squares and feed a crowd.

Making fudgier brownies

These cakey brownies will remind you of the school cafeteria in the best kind of way. For fudgier brownies, just leave out the baking soda.

Either way they are absolutely loaded with chocolate and taste amazing. The only difference is the final texture, so it depends if you like them airy or dense and gooey.

Punching up the chocolate flavor

These brownies are rich and chocolaty as written, but adding coffee makes that chocolate taste even better. Just substitute in coffee wherever you see water in the recipe.

Sheet pan filled with frosted lunch lady brownies.

I was tempted to do that myself, but figured real lunch ladies might shy away from adding coffee to elementary school desserts. The teachers would likely revolt if they found out the kids were being caffeinated at lunch!

Adding coffee won’t make the brownies taste like coffee, it will just boost the chocolate flavor. Though you could add coffee extract or concentrated coffee if you did want to go for a stronger coffee mocha flavor.

Storing leftover brownies

Brownies can be stored in an airtight container at room temperature for up to a week. If you find they start drying out, you can add a slice of sandwich bread to the container to help keep them soft longer.

For longer storage, wrap the extra brownies well and freeze for up to 3 months.

More great brownie recipes

We have been on a bit of a brownie roll lately. There are just so many fun ways to make them.

So if you aren’t looking to whip up a giant half sheet pan filled with frosted brownies, don’t despair. We have plenty of other recipes for you.

Lifting out first piece of lunch lady brownies from sheet pan.

If that coffee and brownie combination caught your interest, check out coffee and cream brownies. It is a much smaller batch, but the layers make them absolutely stunning.

For a slightly larger batch of sticky layered treats, make Mississippi mud brownies. They have marshmallow and chocolate goodness on top of the gooey brownies.

Or make your own homemade brownie mix and store it for later use. Or load it in a jar and give it as an easy edible gift.

Dessert plate with two frosted lunch lady brownies ready to eat.

Rhubarb brownies combine rich fudgy chocolate and brown butter batter with bits of fresh rhubarb. It may sounds like a strange combination, but trust me it works!

Layered monster brownies are the perfect combination of Graham cracker crust, rich chocolaty brownies and peanut butter for an extra special treat.

Love this recipe? Give it a ⭐⭐⭐⭐⭐ review in the recipe card below!

Yield: 36 Servings

Lunch Lady Brownies

Two frosted lunch lady brownies stacked on top of each other with sheet pan of brownies in the background.

Make a giant sheet pan filled with frosted lunch lady brownies for a chocolaty treat big enough to feed a crowd. They are easy to make the chocolate icing takes them to the next level of delicious.

Prep Time 15 minutes
Cook Time 30 minutes
Total Time 45 minutes

Ingredients

Brownies

  • 1 cup butter, melted
  • 1 cup vegetable oil (or similar)
  • 3 1/2 cups granulated sugar
  • 1 cup cocoa powder
  • 4 teaspoons vanilla extract
  • 8 eggs
  • 2 1/2 cups all purpose flour
  • 1/4 teaspoon baking soda
  • 1 teaspoon salt
  • 2 cups chocolate chips

Frosting

  • 2/3 cup cocoa powder
  • 1/4 cup hot coffee or water
  • 1/2 cup soft butter
  • 1/4 cup milk
  • 1 teaspoon vanilla extract
  • 5 cups powdered sugar

Instructions

  1. Preheat oven to 350°F and spray a 13x18-inch sheet pan with cooking spray.
  2. Stir together melted butter, oil, sugar, cocoa powder and vanilla. Add eggs one at a time, mixing well after each addition.
  3. In a separate bowl, mix together flour, baking soda and salt.
  4. Stir flour mixture into butter mixture. Fold in chocolate chips.
  5. Spread brownie mixture in prepared pan and bake for 25-30 minutes. Allow to cool.
  6. To make frosting, stir together cocoa powder and hot coffee or water. Set aside for a minute or two.
  7. Beat butter until smooth and fluffy. Add the cocoa mixture and mix until combined.
  8. Stir in powdered sugar and milk. Whip until smooth.
  9. Spread over cooled brownies.

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Nutrition Information:

Yield:

36

Serving Size:

1

Amount Per Serving: Calories: 368Total Fat: 18gSaturated Fat: 7gTrans Fat: 0gUnsaturated Fat: 9gCholesterol: 62mgSodium: 147mgCarbohydrates: 50gFiber: 2gSugar: 40gProtein: 4g

All nutritional information is estimated and will depend on the exact ingredients you use.

Did you make this recipe?

I'd love to see it! Share a picture on Instagram or Pinterest and tag me @carleecooks to let me know how it went!

Make a giant sheet pan filled with frosted lunch lady brownies for a chocolaty treat big enough to feed a crowd. They are easy to make the chocolate icing takes them to the next level of delicious.

Thanks for sharing!

Valerie

Sunday 16th of October 2022

Where does the oil go?

Carlee

Sunday 16th of October 2022

With the butter and sugar.

Laurie

Thursday 28th of July 2022

Overflowed in my 13 x 18 pan!!! I would not use this much batter...

Carlee

Sunday 9th of October 2022

Hi ladies. I have been working on tweaking the recipe hoping to avoid the overflow issue. The updated recipe has less flour and baking soda, so the results are fudgier so I actually like them better. I have made them a couple of times and haven't had them run over so hopefully that fixes the problem for you as well. If you make them again, please let me know how it goes. Thank you!

Bethany

Monday 26th of September 2022

@Laurie, mine over flowed also. I'm wondering if hers had higher sides on the sheet pan.

Carlee

Friday 29th of July 2022

Oh no! I am really sorry that happened to you. I know what a pain that is. As you can see from my pics and video, my pan gets full but has never overflowed.

Andrea Nine

Friday 26th of November 2021

Perfection in brownie form!!!!

Carlee

Saturday 27th of November 2021

Thank you!

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