Warm 4 tablespoons of water, 75 ml milk and sugar lukewarm. Crumble yeast into it and dissolve. Cover and leave to rise for approx. 10 minutes, adding all the flour. Knead with a hand mixer to a smooth dough. Cover and leave to rise in a warm place for approx. 1 hour
Gently warm 75 ml milk and 1 teaspoon butter. Separate the egg. Knead dough well. Knead or stir in egg yolk, milk-butter, 1 tablespoon sour cream and 1/4 teaspoon salt one after the other. Beat egg white until stiff, fold in. Leave the dough to rise again in a warm place for about 30 minutes
Heat the oil in portions in a frying pan. Bake about 12 blinis at medium heat. Remove and keep warm if necessary. Melt the rest of the butter. Spread the finished blinis with it
Stir 125 g sour cream until smooth and spread on the blinis. Spread the caviar on top and garnish
Drink: cool vodka