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5 from 27 votes

Pumpkin Sheet Cake with Brown Butter Frosting

Pumpkin Sheet Cake with Brown Butter Frosting is a fluffy pumpkin cake for a crowd. The brown butter frosting is to die for! It's buttery and nutty and indulgent.
Prep Time15 mins
Cook Time30 mins
Decorating10 mins
Total Time55 mins
Course: Dessert
Cuisine: American
Keyword: brown butter frosting, carrot sheet cake, fall recipes, one-bowl cake, pumpkin, pumpkin cake, pumpkin cake recipe, pumpkin dump cake, pumpkin spice cake
Servings: 1 (9x13-inch) cake
Calories: 365kcal
Author: Adrianna Adarme
Cost: $12

Equipment

Ingredients

One-Bowl Pumpkin Sheet Cake:

  • 2 cups all-purpose flour
  • 1 3/4 cups white granulated sugar
  • 2 1/2 teaspoons baking powder
  • 2 teaspoons pumpkin pie spice*
  • 1 teaspoon baking soda
  • 1/2 teaspoon kosher salt
  • 3 large eggs
  • 3/4 cup neutral oil (such as avocado, vegetable or safflower oil)
  • 1 (15-ounce) can pure pumpkin puree
  • 1 teaspoon pure vanilla extract

Brown Butter Frosting:

  • 1 1/2 cup unsalted butter divided (2 sticks are just room temperature)
  • 4 cups powdered sugar sifted
  • 1/2 teaspoon pure vanilla extract
  • 1/4 teaspoon fine-grain sea salt
  • 2 tablespoons heavy cream

Instructions

To Make the Cake:

  • Preheat the oven to 350 degrees F. Grease a 9x13-inch cake pan with cooking spray and line with a sheet of parchment (this makes it easier to remove it from the pan) and set aside. Alternatively you can make cupcakes and cake pans
  • In the a medium bowl, whisk together the flour, sugar, baking powder, pumpkin pie spice, baking soda and salt.
  • In the bowl of a stand-up mixer (or a large bowl using an electric mixer), whisk together the eggs, neutral oil, pumpkin puree and vanilla extract until smooth.
  • Add the dry ingredients and mix until just combined. Pour the batter into the pan and smooth it out using an offset spatula or butter knife. Transfer to the oven to bake for 25 to 30 minutes, or until a skewer comes out clean. Allow to cool in the pan for about 10 minutes and then invert it onto a cooling rack. BE CAREFUL IT'S A BIG CAKE.

To Make the Brown Butter Frosting:

  • If you’ll notice in the recipe it calls for the butter to be divided so! Two sticks (1 cup) are going to be room temperature. One stick (1/2 cup) of the butter is what we’re going to brown.
  • Go ahead and start by adding the room temperature butter to the bowl of a stand-up mixer with the paddle attachment (OR a medium bowl using an electric mixer).
  • Cube up 1/2 cup of the butter (1 stick). In a small saucepan, set over medium heat, add the cubed butter. Once it’s melted, it will begin to foam up and bubble a bit. Allow it to cook until you begin to see lightly browned specks beginning to form. Give it a stir and cook until it’s browned. You should also start to smell its nutty aroma. Remove it from the pan and continue to stir to cool it down.
  • Transfer it to a small bowl (freezer-safe) and place it in the freezer to chill, for about 10 to 15 minutes. We want it to be around room temperature butter. After it gets to that room temperature butter-firmness (it can be a bit softer—that’s ok), transfer it to the bowl with the other room temperature butter.
  • Sift in the powdered sugar and add the vanilla extract, salt and heavy cream. Beat the frosting for about 3 minutes. The fluffiness from the heavy cream really lightens up this frosting so be sure to beat it for the full 3 minutes.

To Assemble the Cake:

  • Pour all of the frosting on the cooled sheet cake and spread it around, creating cute swoops as you go. Top it with some sprinkles and cut it up and slice! Cake will stay moist for about 3 days when wrapped properly.

Notes

*If you don't have pumpkin spice, you can make your own by adding this to the dry ingredients:
1 1/2 teaspoons ground cinnamon
1/4 teaspoon ground nutmeg
1/4 teaspoon ground ginger
Pinch of ground cloves
This recipe can be made into cupcakes! 
This recipe will make 24 cupcakes. Fill each cupcake liner about 3/4 of the way. Bake for 20 to 24 minutes, until a skewer comes out clean. 
This recipe can be made into a layer cake! 
Divide the batter into two 8-inch or 9-inch cake pans. Bake for about 30 to 35 minutes, until a skewer comes out clean. 
Let's talk about different oils! 
In the cake pictured, I used vegetable oil. But avocado oil (a very neutral healthy oil) will work great. As will coconut oil, though it will give off a bit of a coconut flavor so beware. 

Nutrition

Calories: 365kcal