Cinnabon-ish Cinnamon Roll Cake

I found the recipe for this cake on www.sixsistersstuff.com/.  I adapted the recipe because I had already purchased a boxed cake mix from Trader Joe's and wanted to use it...and it was less time consuming for sure!

Ingredients for cake:

1 box vanilla cake mix (I highly recommend TJ's Madagascar Vanilla Cake)
1/2 cup butter, softened (1 stick)
1/2 cup brown sugar
1 Tablespoon  flour
1 Tablespoon cinnamon
1/3 cup nuts, walnuts or pecans (optional, I didn't use)

for icing:

1 cup powdered sugar
2.5 Tablespoons milk
1 teaspoon pure vanilla


Directions:

Heat oven to 350 degrees.

Follow the cake mix's instructions for making the vanilla cake and pour into an 8 x 8 or 9 x9 cake pan that has been sprayed with Pam.  Then, mix together the remaining ingredients: softened butter, brown sugar, flour, cinnamon, and optional nuts.  Drop cinnamon/sugar filling by spoonfuls into the cake pan, and use a knife to swirl around the cinnamon/sugar filling to join it nicely with the vanilla cake.  Bake cake for 25-30 minutes.

Let cake cool for no more than 10 minutes.  While cake is cooling, mix together ingredients for the icing.  Drizzle icing over the top of the still-warm cake and serve immediately.  It is best eaten while it is still warm and gooey!