For the egg whiskey punch, first pour the Assam tea with the 1/2 l of boiling hot water and let it steep for 5 min. Strain into a pot.
Now add whiskey, cream, yolks and sugar.
Mix constantly with a hand blender while gently heating the punch. Do not boil under any circumstances!
As soon as the egg-whiskey punch becomes creamy, pour into pre-warmed tea glasses and serve sprinkled with a pinch of cardamom.