In a medium size mixing bowl - mix cake mix, eggs, oil, water, and sour cream - mix till smooth
In a small bowl mix brown sugar and cinnamon together
Pour cake batter into the pan and top with brown sugar topping - using a fork run it around the cake -- you want to create swirls with the cake batter and brown sugar
Bake cake for 40 minutes
In a small bowl mix sugar, heavy cream, and vanilla extract - till smooth. Pour icing over HOT cake and allow cake to cool before you serve.
Enjoy
Recipe by Budget Savvy Diva at https://www.budgetsavvydiva.com/2013/03/honeybun-cake-recipe/