Milk pour into a saucepan, pour in the sugar and vanilla, heat while stirring to dissolve the sugar, bring to boil, reduce the heat, cook 5 minutes until light thick syrup, allow to cool to room temperature.

Softened butter to mix with cooked syrup, beat in one egg ( the second goes for lubrication korikov)

Pour the sifted flour, pre-mixed with soda, knead the dough, and put it in the fridge for 40-60 minutes

Roll the dough out not more than 1 cm in thickness, cut the biscuits, brush with beaten egg yolk and send in the oven preheated to 200 degrees oven for 10-15 minutes ( to roast on the upper level, on the tray I put a silicone Mat )