For the Cake:
2 cups all-purpose flour (240g)
1 teaspoon baking soda
1 teaspoon baking powder
½ teaspoon sea salt
2 teaspoons ground cinnamon
½ teaspoon freshly ground nutmeg
¼ teaspoon ground cloves
¼ teaspoon ground ginger
½ cup unsalted butter, softened (113g)
¾ cup granulated sugar (150g)
¼ cup light brown sugar, packed (50g)
2 large eggs, at room temperature
1 cup pure pumpkin puree (240g)
2 medium overripe bananas, mashed (approximately 1 cup or 230g)
1½ teaspoons vanilla extract
½ cup buttermilk, room temperature (120ml)
For the Cream Cheese Frosting (Optional):
8 oz full-fat cream cheese, softened (226g)
¼ cup unsalted butter, softened (57g)
2 cups confectioners’ sugar, sifted (240g)
1 teaspoon pure vanilla extract
⅛ teaspoon fine sea salt