1/2 cup (115 grams) unsalted butter, at room temperature, plus additional for greasing
1 1/2 cups (215 grams) all-purpose flour
1 tablespoon flaked sea salt, plus more for garnish
1 teaspoon baking soda
1/2 teaspoon ground cinnamon
1/8 teaspoon ground nutmeg
1 cup (190 grams) granulated sugar
1 1/4 cups (255 grams) smashed overripe bananas
1/2 cup (100 grams) sour cream
2 large eggs (100 grams)
1 teaspoon vanilla extract
3 1/2 ounces (90 grams) semisweet chocolate, roughly chopped
Chili powder, for garnish
