Southern Dark Chocolate Texas Sheet Cake

"Ummmseriously! Southern Dark Chocolate Texas Sheet Cake has some Dark secrets! Dark Chocolate secrets, that is! It's got a modern twist and there's no buttermilk or cinnamon. The best part is the chocolate pecan frosting that melts into the cake. *Swoon-Time* My husband liked this version better than the one we grew up with that had cinnamon and buttermilk. And the sour cream just adds a lightness and it’s so moist. I agreed with him. I did like this one just a tad better. Maybe it had to do with I used 2 kinds of chocolate baking cocoa, (one being extra special dark) and then chocolate extract to enhance this Southern beauty. Perfect for summer & get-togethers!"