INGREDIENTS
2 cups
flour (, sifted)
1/2 tsp
baking powder
1/2 tsp
baking soda
1/4 tsp
salt
4 oz
unsalted butter (, softened)
1/2 cup
brown sugar
1/2 cup
sugar (regular)
1
egg
1/2 tsp
vanilla
2
bananas (mashed, very ripe and soft)
1/2 cup
Greek yogurt
1/2 cup
unsalted butter (, softened)
1 cup
creamy peanut butter
2 cups
confectioner's sugar
3 tbsp
milk