COOKED SALAD DRESSING.
Mix one tablespoonful of sugar, one teaspoonful of mustard, one teaspoonful of salt, a speck of cayenne and the yolk of one egg; add two tablespoonfuls of melted butter and one half cupful of milk. Stir over boiling water until it thickens. Take from the fire and add the beaten white of the egg and two tablespoonfuls of lemon juice.