Preheat your oven to 350°F (175°C). Grease and flour three 8-inch round cake pans.

In a large bowl, combine flour, sugar, cocoa powder, baking powder, and salt.

Add milk, vegetable oil, vanilla extract, and eggs to the dry ingredients. Mix until smooth.

Divide the batter evenly among the prepared pans and bake for 25-30 minutes, or until a toothpick inserted comes out clean.

Let the cakes cool completely in the pans before removing.

Spread strawberry jam between the first two layers, and chocolate ganache on top of the second layer.

Assemble the cake, then frost the outside with buttercream and decorate with rose-shaped frosting.