Dorie Greenspan’s Miso-Maple Loaf

Ingredients

• 1¾ cups (238g) all-purpose flour
• 2½ teaspoons baking powder
• ¼ teaspoon baking soda
• ¾ cup (150g) granulated sugar
• ¼ teaspoon fine sea salt
• Finely grated zest of 1 orange or 2 tangerines
• 1 stick (8 tablespoons/4 ounces/113g) unsalted butter, at room temperature
• ¼ cup (70g) white miso
• ¼ cup (60ml) pure maple syrup
• 2 large eggs, at room temperature
• 1½ teaspoons vanilla extract
• ⅓ cup (80ml) buttermilk (well shaken before measuring)
• Glaze (Optional)
• About ¼ cup (80g) orange marmalade or apricot jam
• 1 tablespoon water