2Mix cake mix with 6 remaining ingredients. Pour into a greased and floured Bundt cake pan and bake for 50 min.
Bring FIRST 3 ingredients to a boil and continue cooking to 244 degrees or until syrup spins a 6-8 inch thread. While this is boiling start beating egg whites. Continue beating egg whites as you pour finished boiled mixture in a thin stream into the beaten egg whites. Beat continually until frosting is stiff and glossy. Add vanilla and root bear concentrate and continue to beat until mixed well.