Chocolate Quake Cake Ingredients Frosting: 2 cups heavy whipping cream 4 tablespoons unsalted butter 2 cups granulated sugar 2 cups unsweetened cocoa powder 1/4 cup light corn syrup 1/2 tsp kosher salt 1 tsp vanilla extract Cake: 1 cup (2 sticks) butter, unsalted 2 cups water 1 cup canola oil, or other light tasting