One bowl no mixer homemade chocolate cake! It's perfectly rich and chocolatey, it has a heavenly texture with a fluffy crumb, and the fudgy chocolate ganache frosting is the crowning finish.
Preheat oven to 350 degrees. Spray a 9 by 9 or 8 by 8-inch baking dish with non-stick cooking spray then dust with cocoa. Shake out excess cocoa.
In a large mixing bowl whisk together flour, sugar, 6 Tbsp cocoa, the baking soda, and salt.
Add buttermilk, oil, vanilla and eggs.
Whisk mixture until very well blended (about 1 minute).
Pour into prepared baking dish.
Bake in preheated oven until toothpick inserted into the center of cake comes out clean, about 27 to 35 minutes.
Let cool completely on a wire rack.
Meanwhile make ganache. Place finely chopped chocolate in a medium heat proof mixing bowl.
Heat heavy cream in a small saucepan over stovetop on medium heat until just simmering.
Pour hot cream over chocolate chocolate then stir with a rubber spatula until melted and smooth. Let it cool until it's a thicker consistency, about 30 minutes* then spread over cake and slice.
Notes
*If you want ganache fluffier you can beat it with an electric mixer or by hand some to whip it up.
Another delicious frosting for this cake is chocolate buttercream.