Preparation Steps

• Preheat oven to 350°F. Spray a 9-by-5-inch loaf pan with floured cooking spray, or grease and flour the pan; set aside.
• In a small bowl, combine 1/3 cup granulated sugar with the cinnamon and stir to incorporate; set aside.
• In a large microwave-safe bowl, melt the butter, about 1 minute. After the butter has cooled momentarily, add the egg, brown sugar, oil, vanilla, and whisk to combine. Add the buttermilk and whisk to incorporate.
• Add the flour, nutmeg, baking soda, optional salt, and stir until just combined; don’t overmix. Batter will be thick and lumpy.
• Pour half the batter into prepared pan, smoothing it lightly with a spatula. Sprinkle three-fourths of the cinnamon-sugar mixture evenly over the surface.
• Top with remaining half of the batter, smoothing it lightly. Sprinkle remaining cinnamon-sugar mixture evenly over the top.
• Bake for 45 to 55 minutes, or until top is set and firm, and a toothpick inserted in the center comes out clean with a few moist crumbs.
• Allow bread to cool in pan for about 15 minutes before inverting. Place on wire rack to cool completely.