For the cake, whisk together sugar, brown sugar, and eggs until pale and frothy - this emulsifies the egg and dissolves the sugar.
Mix in melted butter and chocolate, followed by flour, cocoa powder, and salt
Pour into three cake pans, either 6 inches or 8 inches in diameter. Fully cover the pans with parchment paper to prevent sticking
They're ready when the center is domed, the surface is dull, and deep cracks run around the top of the cake
After the cakes have cooled, layer with chocolate frosting. Chill, then pour over chocolate ganache.
Cut yourself a slice and enjoy!