Martin leavens the material somewhat, but this is a faithful, heartfelt, somber piece about family and responsibility.
en.wikipedia.org When this culture is kept in the right conditions, it will continue to grow and provide leavening for many years.
en.wikipedia.org They are usually made with an unleavened dough, but are often encountered leavened.
en.wikipedia.org Ingredients include flour, sugar, salt, ripe banana, pineapple, cinnamon, pecans, vanilla, eggs, and leavening agent.
en.wikipedia.org Some families have leaven cultures, handed down from one generation to the next, that they use for baking these breads.
en.wikipedia.org