Place flour in bowl. Add starter in a well, then add melted shortening and dry ingredients. Mix lightly.
Turn out onto a lightly floured board and knead until the consistency of bread dough, or of a satiny finish. Pat or roll out dough to 1/2-inch thickness, cut and put on a greased pan. Coat all sides of biscuits with melted butter. Let rise over boiling water for 1/2 hour.