In a bowl, whisk together the flour, baking soda, cinnamon, salt and nutmeg. Note: If you LOVE spice, feel free to add some extra spice in here (pumpkin! allspice! more cinnamon! - you can add another 1/2 to 1 teaspoon if you'd like) as this isn't overly spiced.
Pour the batter into the greased baking dish. Bake for 30 to 40 minutes, or until a tester inserted in the center of the cake comes out clean.
Beat the cream cheese and butter together until creamy. Beat in the sugar and cinnamon until combined. Beat in the vanilla extract. Frost the cooled cake! I like to keep the cake in the fridge because of the cream cheese frosting, plus we love cold cake!