Cinnamon Roll Poke Cake

1 box vanilla or white cake mix, plus needed ingredients
14 oz. can eaglebrand milk
4 T. butter, melted
1/2 c. packed brown sugar
2 t. ground cinnamon
4 oz. cream cheese, softened
1/3 c. butter, softened
2 c. powdered sugar
1 t. vanilla
1 T. milk

Preheat oven to 350. Spray 9x13 dish. Prepare cake mix as directed. Pour into dish. Allow cake to cool after baking. Using  the wooden handle, poke holes all over the cake. In a small bowl, whisk together eaglebrand milk, melted butter, brown sugar and cinnamon. Pour into holes and spread evenly.. In a medium bowl, combine cream cheese and butter with an electric mixer. Slowly add powdered sugar, vanilla, and milk. Mix until smooth. Spread onto cake. Sprinkle some cinnamon sugar on top of frosting. Place in refrigerator for frosting to set up. Store refrigerated.