Preheat the oven to 350?F (175?C). Grease and flour a cake pan.

In a mixing bowl, whisk together flour, sugar, cocoa powder, baking powder, baking soda, and salt.

Add the egg, milk, vegetable oil, and vanilla extract. Mix until smooth.

Pour the batter into the prepared cake pan and bake for 30 minutes or until a toothpick comes out clean.

Let the cake cool in the pan for 10 minutes, then transfer to a wire rack to cool completely.

In a saucepan, heat the heavy cream over medium heat until it begins to simmer.

Remove from heat and add the chocolate chips. Stir until smooth and glossy.

Once the cake is completely cool, slice it in half horizontally.

Spread the cherry filling on the bottom layer of the cake.

Place the top layer back on and pour the chocolate ganache over the top, allowing it to drip down the sides.

Let the ganache set for a few minutes before slicing and serving.