Sift together bread flour, salt, sugar. Add gradually water, egg, salad oil. Strain mixture into a cup and let stand 2 hours or over night. Put timbale iron in deep saucepan and cover with fat or oil. Heat fat until it browns a piece of bread in 40 seconds.
Drain iron, dip in timbale mixture until two-thirds covered. Then immerse in hot fat and fry until crisp and a delicate brown. Drain cases on brown paper. A rosette iron may be used instead of a timbale iron if desired.