Nigella's simple banana bread

1/3 cup unsalted butter, melted
1/2 cup sugar
2 eggs at room temp
3-4 ripe bananas, mashed
1 teaspoon vanilla
1 cup ww or a/p flour
2 teaspoons baking powder
1/2 teaspoon bicarbonate of soda
1/2 teaspoon salt


Preheat oven to 170º. Grease and line a loaf tin.
Beat butter and sugar until blended.
Beat in eggs one at a time, then bananas. Stir in vanilla.
In another bowl, combine flour, baking powder, bicarb soda and salt.
Add flour mixture.
Pour into tin and bake for 25 min (for small loaf pans).