Ingredients

• 3 3/4 cups flour
• 1 1/2 teaspoons baking powder
• 1 teaspoon ground cinnamon
• 1/2 teaspoon fine sea salt
• 1/4 teaspoon ground nutmeg
• 1 cup unsalted butter , room temperature
• 1 cup granulated sugar
• 1/2 cup light brown sugar
• 1 cup ripe banana* , mashed
• 1 large egg , room temperature
• 2 teaspoons vanilla extract