Banana Cake with Vanilla Bean Frosting

INGREDIENTS

2 tbsp

unsalted butter (at room temperature)

2/3 cup

sugar

1/2 cup

sour cream

3/4 cup

mashed very ripe banana (about 2 bananas)

egg

1 tsp

vanilla

1 cup

flour

1/4 tsp

salt

1/2 tsp

baking soda

2 tbsp

butter (at room temperature)

1 1/4 cups

powdered sugar

1/2

vanilla bean (seeds scraped from the bean, or Â½ teaspoon vanilla)

salt

1/4 cup

heavy cream or milk