Preheat oven to 350 degrees and grease your bundt cake pan well.
In mixing bowl, combine cake mix, puddings, oil, water, milk and eggs with electric mixer. Pour into prepared pan and bake 40-45 minutes or until toothpick inserted comes out clean.
Let cake cool.
To make the frosting, use an electric mixer and combine powdered sugar with butter and milk until you reach your desired frosting consistency. Add more powdered sugar if it's too thin and more milk if it's too thick.
Frost cooled cake and enjoy!