Cayla's family loves when she makes this banana bread!

1/2 cup butter(melted)
1 cup granulated sugar
2 eggs (beaten)
3-4 RIPE bananas (mushed)
1 1/2 cup AP flour
1 tsp baking soda
1/2 tsp salt
1 tsp vanilla extract
1/2 tsp baking powder
OPTIONAL:
1/2 cup kefir( to make more moist)
1/2 cup walnut or choco chips