Ingredients
Equipment
Method
Prepare the pan and cinnamon swirl
- Heat the oven to 350°F.
- Grease a 9x5-inch loaf pan.
- Stir the cinnamon swirl sugar and cinnamon together in a small bowl.
Make the bread
- Whisk the flour, bread sugar, baking powder, baking soda, and salt in a large bowl.
- Whisk the eggs, sour cream, melted butter, and vanilla in a medium bowl until smooth.
- Add the wet mixture to the flour mixture and stir just until no dry streaks remain.
Assemble and bake
- Spread half the batter in the pan, sprinkle with half the cinnamon sugar, spread the remaining batter on top, then sprinkle with the remaining cinnamon sugar and gently swirl with a knife.
- Bake for 55–65 minutes, until the top is golden and a toothpick inserted into the center away from the cinnamon swirl comes out with a few moist crumbs.
- Cool in the pan for 15 minutes.
- Transfer the loaf to a wire rack and cool for at least 1 hour before slicing.
Notes
Gently swirl the cinnamon sugar without mixing it fully into the batter. Store airtight at room temperature for up to 3 days or refrigerate for up to 1 week; freeze yes, for up to 3 months. Plain Greek yogurt can replace the sour cream.
