בצק שמרים עם מילוי אגוזי מלך

I learned this trick from a baker! The whole family is surprised!

Additionally

warm milk: 300 ml (10 fl oz)

vanilla sugar: 5 g (0.2 oz)

sugar: 100 g (3.5 oz)

dried yeast: 10 g (0.4 oz)

eggs: 1 pc

butter: 40 g (1.4 oz)

flour: 600 g (21 oz)

salt: 2 g (0.1 oz)

vegetable oil: 30 ml (1.0 fl oz)

soft butter: 80 g (2.8 oz)

sugar: 50 g (1.8 oz)

walnut: 150 g (5.3 oz)

milk: 25 ml (0.8 fl oz)