You'll notice there is no chocolate icing and (you can't really tell) but there is no chocolate in the cake. As much as I love chocolate and I love cinnamon I don't really like them together. Plus not making the icing made these even faster. I did do a lite dusting of powdered sugar on top and that made these taste even better, although I would think vanilla ice cream would make them awesome too.
This awesome recipe was picked by Tracey of Tracey's Culinary Adventures, look there for the recipe. And see how all the TWD members handled this cake here.
Cinnamon Squares from Baking From My Home to Yours by Dorie Greenspan, pages 210-211.