This 9x13 Black Forest sheet cake has all the beloved flavors of traditional Schwarzwälder Kirschtorte - tart & fruity cherries, rich chocolate cake, and a smooth vanilla topping. The only difference is that this version is much easier & faster to make, since there's no need to stack cake layers!
2teaspoonslemon juice (or substitute white vinegar)
1¾cupsall purpose flour
1¾cupsgranulated sugar
¾cupsunsweetened cocoa powder
1teaspoonsalt
1teaspoonbaking soda
1½teaspoonbaking powder
2large eggs
1Tablespoonvanilla extract
½cupvegetable oil
Cherry Filling
14ouncesdark cherries or sour cherries in syrup (one can)
1Tablespooncornstarch
Vanilla Frosting
1cupunsalted butter, softened to room temperature (2 sticks)
3cupspowdered sugar
¼teaspoonsalt
1teaspoonvanilla extract
2Tablespoonsmilk (at room temperature)
Toppings
extra canned or fresh cherries
semisweet chocolate bar (shaved with a box grater or vegetable peeler)
Instructions
Make the Chocolate Cake
Preheat the oven to 350°F. Grease a 9-inch by 13-inch baking dish and line it with parchment paper so the paper reaches over all four sides by a few inches. Set aside.
Combine the milk and lemon juice in a small bowl. Let sit for 10 minutes at room temperature to curdle.
In a large mixing bowl, whisk together the all purpose flour, granulated sugar, unsweetened cocoa powder, salt, baking powder and baking soda. Set aside.
In another large mixing bowl, whisk together the eggs, vanilla extract, vegetable oil and the milk + lemon juice mixture.
Add the wet ingredients into the dry ingredients and mix until there is no dry flour visible.
Pour the batter into the prepared baking dish. Bake for 30 to 35 minutes, until a toothpick comes out clean from the center of the cake.
Make the Cherry Filling
Open the can of cherries and pour 2 tablespoons of the syrup from the can into a bowl.Drizzle or brush the 2 tablespoons of syrup on top of the warm cake once it comes out of the oven. Allow the cake to cool completely (for at least 1 hour). The cake will soak in the syrup as it cools.
While the cake cools, prepare the cherry filling. Pour 2 tablespoons of the syrup from the can into a small bowl. Add the cornstarch and whisk with a fork until there are no clumps. Set aside.
In a medium saucepan on medium-high heat, add the canned cherries and any remaining syrup in the can. Tip: If you want to add a few cherries on top of the cake for decoration, set those aside in the fridge now, until the cake is ready to be decorated.
Bring the cherries and syrup to a boil, then pour in the syrup + cornstarch mixture. Continue stirring the mixture constantly as it boils for one minute. Remove the saucepan from the heat and side aside to cool and thicken.
Prepare the Vanilla Frosting
While the filling and cake continue to cool, prepare the frosting. In a large mixing bowl with an electric hand mixer or in a stand mixer with the paddle attachment, beat the softened butter until it is fluffy and smooth, after a few minutes.Add the powdered sugar, salt, vanilla extract and milk to the butter and continue to beat it until it is well-combined and fluffy, after a few minutes.
Assemble the Sheet Cake
To assemble the cake, first remove the cooled cake from the baking pan by lifting it out with the parchment paper.
Spread the cooled, thickened cherry filling on top of the cake in an even layer.Dollop the vanilla frosting onto the cherry layer, then use a silicone spatula or the back of a spoon to spread out the frosting in an even layer. Top with grated chocolate and fresh or extra canned cherries. Slice and enjoy!!
Notes
Chocolate Topping: When grating chocolate, you can use a box grater to create a chocolate dusting, or a vegetable peeler to create chocolate curls.
Serving Tip: If you plan to remove the cake from the baking pan once it’s cooled, I recommend lining your baking sheet with parchment paper. This will help you lift out the cake. Or leave it in the baking pan as you decorate it, and just lift out slices as you serve it!