Mom's Banana Bread

I had this a lot growing up, it's great.

2 2/3 cups flour
3 teaspoons baking powder
1/2 teaspoon baking soda
1 teaspoon salt
1/2 cup butter*
1 cup sugar
3 eggs
2 bananas (if I have more I use more)
extras**

1. mix top 4 ingredients together
2. in a separate bowl cream butter and sugar
3. add eggs to creamed sugar and butter, mix
4. add bananas to mixture, mix
5. add dry to wet, in batches.
6. makes 2 loaves, bake at 350 degrees until a tooth pick comes out clean.

* I have also used 1/3 cup oil, or 1/2 cup applesauce, it all works well. The butter gives it a richer taste, but oil is better for you, and applesauce is the best, but results in a drier loaf.
**extras could be chocolate chips, raisins, or nuts. I've also adds citrus zest and it's nice. I add raisins etc. when everything is mixed together. If I'm adding zest I add it to the moist before adding the dry.