Classic one: https://fatmap.com/routeid/2754690/madlochjoch-to-zug

This one: Leave the Madlochjoch chairlift straight and follow the piste until you pass some short uphill section. Ideally take some speed before to avoid having to step uphill. You then see the the peak of the Stierlochkopf on the left. Turn left after it, first following the ridge then turning right once it opens up. The creek bed of the Mahderbaechli is visible, stay left of it, there is plenty of options, including a small couloir on the far left. Beware of a rock band half way down which is fairly easy to navigate unless you go completely ballistic.

An alternative from Madlochjoch is to ski out, skiers left staying as high as possible traversing over the next ridge while skiing still fairly high prior to turning right through Stierfall. From here ski all the way straight to the creek and follow the same way to Zug.