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Brownie Sheet Cake

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This Brownie Sheet Cake recipe is so good.  It’s a mix between a brownie and chocolate sheet cake.  Yum!

Brownie Sheet Cake slices
How about a little sweet temptation?  Let me tell you how I came up with this Brownie Sheet Cake recipe.

A couple of years ago my youngest child had a math tournament and his school is hosted it.  Parents were asked to bring some goodies for a concession sale.  I thought that brownies should be a hit.

In looking through a lot of recipes, though, I realized that most recipes only make a 9×9 or an 8×8 pan.  I wanted something bigger.

I combined some elements of a few recipes, tweaked them a little, and bam!  Brownie Sheet Cake!

cocoa and sugar

I started off by making a simple chocolate syrup.  Just sugar, cocoa, water, vanilla, and a little salt.

boiling chocolate

I make the syrup first because it has to come to a boil and then cool.  It will thicken some during the cooling period.

Prepared Pan

While the syrup was cooling, I got to work on other aspects of the brownies, like preparing my 9×13 pan.  I lined it with aluminum foil and sprayed it with non-stick spray.

Flour, baking powder, and espresso

I then got all of my other ingredients together.  (Above is flour, baking powder, salt, and espresso powder.)

Eggs

Typically eggs are added one at a time.  I like to crack all of mine into a little glass bowl.  I then try to pour them in, one at a time.

Cocoa Butter, butter, and oil

The recipe has a mixture of cocoa powder, butter, and oil.  This is quite bitter since there is no sugar.  But that is okay since there are two cups of sugar in the brownie batter.

Brownie batter
Luscious batter  – still not ready

Brownie Sheet Cake cooling in pan

This is how it looks before the icing is added.

Butter and Chocolate

The icing is a simple chocolate glaze made with chocolate chips, butter, and a little corn syrup.

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Brownie Sheet Cake
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Brownie Sheet Cake

Brownie Sheet Cake - this dessert recipe is so good. It's a mix between a brownie and chocolate sheet cake. Yum!

Course Dessert
Cuisine American

Ingredients

Chocolate Syrup

  • ¼ cup unsweetened cocoa powder
  • ½ cup water
  • 1 cup sugar
  • 1 tsp vanilla
  • ¼ tsp salt

Brownie Batter

  • 1½ cups all-purpose flour
  • 1 tsp baking powder
  • 1 tsp salt
  • 2 Tbsp espresso powder
  • 10 Tbsp butter
  • ¾ cup baking cocoa
  • ¼ cup vegetable oil
  • 2 cups sugar
  • 4 large eggs
  • 2 tsp vanilla extract
  • two-thirds cup chocolate chips
  • Chocolate Syrup

Chocolate Icing

  • 1¼ cups chocolate chips
  • 3 Tbsp corn syrup
  • 1 stick butter

Instructions

  1. To make the syrup: in a medium or large saucepan, whisk the cocoa powder and sugar until well blended. Add water and whisk over medium-high until it starts to boil and becomes a little frothy. Continue boiling for approximately 3 minutes. Reduce heat and allow to simmer for 2 more minutes. Remove from the heat and add salt. Let cool.
  2. Preheat oven to 350 degrees. Line bottom of 13x9 pan with aluminum foil and spray with non-stick cooking spray.
  3. Combine flour, baking powder, salt, and espresso powder and set aside.
  4. Microwave butter until melted in a medium size glass bowl. Add cocoa and oil and whisk until smooth.
  5. Transfer cocoa mixture to a bowl of an electric mixer. Stir in sugar. Add eggs, one at a time, mixing well after each addition. Add vanilla. Gradually add flour mixture. Pour in chocolate syrup and chocolate chips.
  6. Pour batter into prepared 13x9 pan and bake for 25-30 minutes or until done. Let cool before icing.
  7. To make the icing: Melt chocolate chips and butter together in a microwave-safe bowl in 30 second intervals on high, stirring well after each segment. (It took me a total of one minute + an additional 10 seconds.) Add corn syrup and stir until smooth. Let sit for 5 minutes before pouring over brownies.

Iced Brownie Sheet Cake


Like chocolate?  Be sure to check out these other delicious chocolatey desserts:

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Comments

    • The “concession stand” was a room full of food that was available for parents of children who were competing in the competition. Parents of children at the host school were asked to bring goodies for the visitors.

      Reply

  6. Wow!! Thus is indeed a temptation… I love brownies, and I love baking them!! Recipe saved 😀
    Loved your blog by the way, I found it via 2 wise monkeys abroad 😀
    I will follow you on your social media channels, so we can keep in touch!
    Have a great week,
    Allane

    Reply

    • I cannot recall what brand, but it was more than likely either Nestle, Publix, or Kroger’s Simple Truth Organic chocolate chips.

      Reply

    • Honestly, I don’t remember what brand, but it would probably have been Nestle, Publix brand, or possibly Kroger’s Simple Truth.

      Reply

  16. Hey just wondering if it would still be yummy without the espresso powder? I don’t have any in my house due to not drinking coffee or using it in anything. They just look so yummy I really want to try them!

    Reply

    • I would imagine they should be fine without the espresso powder. If I did not have espresso powder I would still make them. The powder just helps to highlight the chocolate flavor.

      Reply

    • Thank you so much for catching that! Melt the butter with the chocolate chips in the microwave. (I went back and corrected the recipe.) 🙂

      Reply

  23. This looks great! I also have to make some concession stand food in a couple of weeks. Maybe I’ll try your recipe.

    Reply

  28. Now that’s the size of brownie recipe I needed! With a large family, this is perfect! Thank you!

    Reply

  37. OMG! This looks utterly amazing! My son makes something similar but I think he needs to add the syrup. I’m going to show him this.

    Happy SITS Saturday Sharefest!

    Reply

  38. You had me at brownie but then you took it over the top! I might do this for my little guys 2nd birthday! Great idea. Thanks for sharing.

    Reply

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