01 -
Warm the cream in a microwave until steaming hot. Toss in the chopped chocolate and let it sit for 2 minutes. Stir until it’s silky smooth, then set aside to cool down.
02 -
Set your oven to 350°F. Coat a 9x13 pan with a spray or a little butter.
03 -
Mix unsweetened cocoa powder with hot water or coffee until smooth and kind of thick.
04 -
Stir together brown sugar, vanilla, oil, eggs, and sour cream. Add dry ingredients (flour, soda, powder, and salt) and mix gently until the batter just comes together.
05 -
Pour batter into the greased pan. Bake it for 30 to 35 minutes, or until a clean toothpick comes out. Let it cool completely, about 1 hour.
06 -
Once the ganache is like soft peanut butter, whip it until it’s airy and light, about 4 minutes. Spread it generously over the cooled cake.