3 cups flour, sifted
1½ teaspoons soda
¾ teaspoon salt
1 tablespoon sugar
⅓ cup shortening
1 cube yeast, or packet dry yeast
¼ cup water, lukewarm
6 tablespoons vinegar, plus

Sift flour, baking soda, salt and sugar together and cut in shortening. 

1. Soften yeast in lukewarm water. 

2. Heat vinegar and milk to lukewarm and combine with yeast. 

3. Add liquid to dry ingredients gradually and stir only until flour is blended. 

4. Dough should be as soft as can be handled. 

5. Turn onto lightly floured board, knead gently one minute. 

6. Shape onto lightly floured lightly greased baking pan. 

7. Let rise about an hour until doubled in bulk in warm place. 

Bake at 400º for about 15 minutes.