Start by preheating your oven to 350°F (175°C). Grease and line two or three round cake pans (two pans) with parchment paper.
Take a large bowl and begin by sifting together all your dry ingredients—flour, cocoa powder, baking soda, baking powder, and salt—to get them perfectly combined.
In a different bowl, beat together the sugar, eggs, buttermilk, oil, and vanilla extract until everything is smooth and beautifully mixed.
Slowly mix the dry ingredients into the wet ones, stirring gently until they’re just blended.
Evenly pour your batter into your prepared pans and smooth out the tops.
Next, pop it in the oven and bake for about 30 minutes, or you can just insert a toothpick in the center, and it should come out clean. Once baked, allow the cakes to cool in the pans for a minimum of 10 minutes. Gently move the cakes to a wire rack and allow them to cool completely before proceeding.
Make the Cherry Filling
Wash the cherries well under cold water, then remove the pits using a cherry pitter. Place the cherries in a saucepan with sugar and a tablespoon of fresh lemon juice. Heat them by stirring occasionally, until they release their juices.
grab your cornstarch (mixed with little water), then stir it into the cherries. Continue cooking, stirring constantly, until the mixture thickens to a smooth consistency.
Let the filling cool completely before layering the cake.
Prepare the Frosting
go ahead and beat the butter in a mixing bowl until it’s soft, smooth
Slowly add the cocoa powder and powdered sugar, ensuring they are well mixed after each addition.
Slowly add heavy cream, a tablespoon at a time, mixing until the frosting is smooth and creamy.
Blend in the vanilla extract.
Assemble the Cake
Place the first cake layer onto your cake stand or serving plate, setting the stage for a delicious masterpiece.
Spread a generous dollop of the cherry filling and gently spread it out.
Continue layering the remaining cake layers, stacking them slowly and with care to keep everything nice and even.
After stacking all the layers, with an offset spatula in hand, gently smooth the chocolate frosting over the cake, covering both the top and sides evenly.
Top the cake with whole cherries or a sprinkle of chocolate shavings if you want. Step back and admire your work.