PureWow on Instagram: "We put Ina Garten’s famous chocolate cake recipe to the test, and it’s everything you dream of—rich, moist and absolutely irresistible. 🍫🍰 Ingredients: Cake: -1.75 cups flour -2 cups sugar -3/4 cups cocoa powder -2 tsp. baking soda -1 tsp. baking powder -1 tsp. salt -1 cup buttermilk -2 eggs -1/2 cup vegetable oil -1 tsp. vanilla extract -1 cup hot coffee Buttercream: -2 sticks butter, room temp. -6 oz. semisweet chocolate -1 egg yolk -1 tsp. vanilla extract -1.25 cups p