Byelorussian` biscuits

For 1 kg of the biscuits:
3.22 glasses of flour
l.5 glasses of sugar
1.25 glasses of butter
0.5 glass of milk
100 g of jam
3 g of soda
vanillin
salt

Dissolve sugar in milk, add soda, salt, vanillin, mix everything to make a homogeneous mass, pour in wheat flour and mix again. Lay out small portions of the prepared mass with the help of confectionery bag. Put large drops of apple jam on to the center of each biscuit. Bake biscuits in the oven at 200 C.