Preheat the oven to 350°
Spray a 9x13 baking dish with nonstick cooking spray and set aside
mix the vegetable oil and the honey together with a whisk, set aside, stir again before using in the next step
Put the cake mix, eggs, and sour cream to a large mixing bowl, add the vegetable oil and honey mixture, mix with a hand mixer until everything is mixed together
Scrape around the edges of the bowl to make sure everything is very mixed together and no cake mix remains on the sides
Pour half of the batter into the baking dish and spread around
In a small mixing bowl and add the brown sugar and cinnamon and mix together
Sprinkle half of the over top of the batter, making sure to get it everywhere, then cover with the remaining batter, then top with the last of the cinnamon sugar
Bake for 30-35 minutes or until it is no longer jiggly in the center and sticking a toothpick in the middle comes clean
Let cool for 30-45 minutes
Once it’s almost cool, prepare the icing: Sift the powdered sugar into a medium bowl
Add the vanilla and just enough milk to make a pourable icing, be sure you don't add so much that it is runny
Let cool for 25 minutes and let the icing get harden up a bit