On the other hand, yeast requires time to digest the sugars and ferment the bread. So while a yeast bread may need 4-5 hours to prove this self raising flour bread is ready to bake almost immediately. Do you need yeast when using self-raising flour to make bread? No, at least not the traditional bread yeast. When using self rising flour thePreheat oven to 325 degrees F. If necessary, grease/spray the bread pan or use baking parchment paper to line the bread pan. Mash bananas with a fork. Lightly beat eggs. Soften the butter in a microwave. Stir bananas, eggs, butter (or oil), milk and white & brown sugars together in a large mixing bowl. .