1. Boil the eggs in salted water for about 4 minutes, strain and quench briefly. Then peel, put into a bowl and crush with a fork. Season the egg mixture with créme fraîche, salt, pepper and cayenne pepper and blend finely with a hand blender.
2. Stir in the vodka and butter. Heat the mixture over a low heat while stirring, but be careful that it does not stick. Now pour the lukewarm mixture into small shot glasses and garnish with caviar.