Sift flour and salt into a bowl. Add yeast and sugar. Rub in the butter until breadcrumbs form

Add milk and eggs mixture and knead until a soft dough forms. Cover and let rise for 1 hour

Divide dough into 16 balls and shape into rounds. Place a small tablespoon of jam in the center of each ball, pinch to cover the jam and form a round again

Let rest for 20 minutes. Heat oil and deep fry the doughnuts until golden brown

Place on plate with kitchen towel to remove excess oil. Generously sprinkle with icing sugar