Cinnamon Roll Poke Cake

Name: Cinnamon Roll Poke Cake
Prep time: 30 min
Cook time: 38 min
Total time: 1 h 8 min
Cuisine: American
Ingredients: 1 box vanilla cake mix; ingredients needed to make cake: eggs, oil and water; 14 ounce can sweetened condensed milk; 4 Tablespoons melted salted butter; 1/2 cup packed brown sugar; 2 teaspoons ground cinnamon; 1/2 block (4 ounces) cream cheese, softened to room temperature; 1/3 cup butter, softened to room temperature; 2 cups powdered sugar; 1 teaspoon vanilla extract; 1 Tablespoon heavy cream or milk; cinnamon sugar ((for topping, optional))