This sheet cake is without a doubt one of the most crowd-pleasing desserts we've ever served. It's simple to prepare and feeds a crowd. Cut the squares to your own liking, but we typically cut them into 4 rows by 6 rows, which gives you 24 pieces of cake.
1 half sheet pan13"x18" (can also use 10"x15" or regular baking sheet)
Cooking spray
Ingredients
For the Cake
2cupssugar
1cupwater
½cupcanola oil
½cupbuttermilk
½cupunsalted buttermelted
2largeeggslightly beaten
1teaspoonvanilla extract
2cupsall-purpose flour
⅓cupunsweetened cocoa powder
1teaspooncinnamonground
1teaspoonbaking soda
¼teaspoonKosher salt
Warm Chocolate Frosting
½cupunsalted butter
⅓cupwhole milk
1lbconfectioners' sugar4 cups
⅓cupunsweetened cocoa powder
1teaspoonvanilla extract
¼teaspoonKosher salt
¼teaspooncinnamonground
1cuppecanschopped, optional
Instructions
Preheat oven to 400°F.
In a large bowl, whisk together the sugar, 1 cup water, oil, buttermilk, melted butter, eggs, and vanilla. Set aside.
2 cups sugar, 1 cup water, ½ cup canola oil, ½ cup buttermilk, ½ cup unsalted butter, 2 large eggs, 1 teaspoon vanilla extract
In another bowl, whisk together the flour, cocoa, cinnamon, baking soda, and salt.
2 cups all-purpose flour, ⅓ cup unsweetened cocoa powder, 1 teaspoon cinnamon, 1 teaspoon baking soda, ¼ teaspoon Kosher salt
Slowly stir the flour mixture into the wet mixture and continue stirring until smooth and fully combined (it's okay if there are a few bubbles or bumps).
Spray the sheet pan with cooking spray.
Transfer the cake batter to the pan and smooth it out with a spatula.
Bake for 20 minutes, or until an inserted toothpick comes out clean. Remove from oven and let rest for 10 minutes. Make the warm chocolate frosting immediately.
Make the Warm Chocolate Frosting
In a medium-sized saucepan, melt the butter with the milk over medium-low heat.
½ cup unsalted butter, ⅓ cup whole milk
Turn off the heat and stir in the confectioners' sugar, cocoa, vanilla, salt, and cinnamon until silky smooth.
Pour the warm frosting over the cooled cake and smooth with a spatula. Top with chopped pecans, if using.
1 cup pecans
Video
Notes
See the video near the top of the blog post for visual guidance. If you liked the video, please subscribe to our YouTube channel.We recommend that all of the ingredients be at room temperature when making the batter, however, if you forget to set anything out, you'll still be okay. The cake has a slightly better texture when all ingredients are room temp. Be sure to let the cake cool for at least 10 minutes before adding the warm icing. The cake can be made up to 24 hours in advance before icing. Wrap it tightly in plastic wrap and make sure it's room temperature before making the warm chocolate icing. Leftovers will keep covered for up to 5 days and can be frozen for up to 1 month.