Pumpkin Sheet Cake with Browned Butter Cinnamon Icing is my new favorite fall dessert that’s so easy to make. It’s perfect for feeding a crowd or a bake sale.
If you make just one pumpkin dessert this fall, this has got to be the one! You’ve all heard of Texas Sheet Cake, right? Well, I’m calling this a Pumpkin Sheet Cake. It’s not quite a cookie bar, not quite a brownie, so Pumpkin Sheet Cake it is. What makes this dessert amazing is the Browned Butter Cinnamon Icing. It ignites the taste buds with its rich, nutty, toffee undertones.
This recipe makes a TON! I’m talking 24 big slices. This would be the perfect dessert to feed a crowd, bring to a potluck, or sell at a bake sale.
- When mixing the flour into the cake batter, make sure you mix until just combined. Because no one likes a tough, over-mixed sheet cake.
- When browning the butter for icing, you must constantly swirl the pan. The butter can go from browned & nutty to burnt & stinky if you’re not watching carefully.
Pumpkin Sheet Cake with Browned Butter Cinnamon Icing
For the Cake:
- 5 cups all-purpose flour
- 2 teaspoons baking powder
- 2 teaspoons baking soda
- 1 teaspoon salt
- 1 Tablespoon pumpkin pie spice
- 2 cups unsalted butter softened
- 2 cups granulated sugar
- 2 large eggs
- 2 teaspoons vanilla
- 15- ounce can pumpkin puree
For the Icing
- ½ cup unsalted butter
- ½ cup packed dark brown sugar
- ¼ teaspoon salt
- 3-4 Tablespoons milk divided
- 2 Tablespoons maple syrup
- 1 teaspoon vanilla
- 2 ¾ cups powdered sugar sifted
- 1 teaspoon cinnamon plus more for sprinkling
For the cake:
- Preheat oven to 350 degrees F. Spray a half sheet sheet pan with nonstick cooking spray and set aside.
- In a large mixing bowl whisk together the flour, baking powder, baking soda, salt, and pumpkin pie spice. Set aside
- In the bowl of a stand mixer fitted with a paddle attachment, beat the butter and sugar on medium speed until combined and creamy, about 1 minute. Add the eggs and vanilla and beat on low until combined, about 30 seconds. Beat in the pumpkin on low until just combined. Add the flour and pulse the mixer until half of the flour is mixed in. Increase the speed to low and mix until just combined.
- Pour the batter into your prepared sheet pan and spread evenly with an offset spatula. Bake for 25-30 minutes, or until a toothpick inserted comes out with just a few moist crumbs. Place the sheet pan on a wire rack to cool completely, about 2 hours.
For the Icing:
- In a medium saucepan over medium-high heat, melt the butter and continue to cook, swirling the pan constantly until the butter is dark golden brown (not burnt) and has a nutty aroma. Remove the saucepan from the heat and whisk in the brown sugar, salt, 2 tablespoons of the milk, maple syrup, and vanilla.
- Transfer the mixture to the bowl of a stand mixer fitted with a paddle attachment and beat on medium speed for 30 seconds. Let the mixture rest for 3 minutes, then mix again on medium speed for 30 seconds. Repeat for one more round of resting and mixing. Add the sifted powdered sugar and cinnamon, pulse until almost entirely combined, then increase to medium and beat until creamy. Add milk, 1/2 tablespoon at a time, until the desired consistency is reached.
- Using an offset spatula, spread the icing over the cake. Let set up for 30 minutes before slicing into 24 squares.