Ingredients

Ingredients

3 cups (360 grams) all-purpose flour

1 Tablespoon (14 grams) baking powder

1/2 teaspoon salt

1/4 teaspoon freshly grated nutmeg

1/4 teaspoon ground cinnamon

1/2 cup (113 grams) unsalted butter, melted and slightly cooled

1/2 cup (106 grams) light brown sugar, packed

1/2 cup (99 grams) granulated sugar

2 large eggs, at room temperature

2 teaspoons pure vanilla extract

3/4 cup (170 grams) full-fat sour cream

1 cup (227 grams) mashed ripe banana

1 pint (292 grams) fresh blueberries

1/2 cup toasted walnuts, finely chopped

2 Tablespoons sparkling sugar, optional

Instructions