1.1 cup butter milk is equivalent to 1 1/3 tsp of cream of tartar plus 1 cup of sweet milk. 2. 1 egg yolk is equal to 1 13 T frozen egg yolk. 3. 1 packed dry yeast compressed yeast cake may be substituted for 1 tsp active dry yeast. by a T cornstarch 4. IT All purpose flour may be the substitute for a % T cornstarch 5.1 cup honey be the substituted with 2 cups sugar.