Cinnamon Swirl Quick Bread

This vanilla-flavored cinnamon swirl quick bread is moist and soft with a thick ribbon of cinnamon-sugar swirled inside. Feel free to turn this recipe into muffins or mini loaves. See recipe Notes below. This recipe is also in my cookbook, 

Ingredients

Cinnamon Swirl

• 1/2 cup (100g) granulated sugar
• 1 Tablespoon ground cinnamon

Bread

• 2 cups (250g) all-purpose flour (spooned & leveled)
• 1 teaspoon baking soda
• 1/2 teaspoon salt
• 3/4 cup (150g) granulated sugar
• 2/3 cup (160ml) whole milk, at room temperature*
• 1/3 cup (75g/80ml) vegetable oil
• 1/3 cup (80g) full-fat sour cream (or plain yogurt/Greek yogurt), at room temperature*
• 1 large egg, at room temperature
• 1 and 1/2 teaspoons pure vanilla extract
• optional: vanilla icing

Instructions

1. Preheat the oven to 350°F (177°C). Spray a 9×5-inch or 8×4-inch loaf pan with nonstick spray.
2. For the Cinnamon Swirl: In a small bowl, mix the sugar and cinnamon together. Set aside.
3. Make the Bread: In a large bowl, whisk the flour, baking soda, and salt together. In a medium bowl, whisk the sugar, milk, oil, sour cream, egg, and vanilla extract. Pour the wet ingredients into the dry ingredients, then whisk just until combined. Avoid over-mixing. The batter should be thick and creamy. 
4. Pour/spread about half of the batter into the prepared loaf pan. Sprinkle almost all of the cinnamon-sugar evenly on top (reserve about 2 Tablespoons for topping). It’s a very thick layer of cinnamon-sugar. Carefully pour/spread the remaining batter evenly on top. The top layer of batter will try to stick to the cinnamon-sugar filling, making spreading a little more difficult, but use a spoon to carefully spread it out as best you can. Sprinkle the remaining 2 Tablespoons of cinnamon-sugar on top. Using a knife, make a large swirl down the loaf pan, as shown in the video tutorial. Avoid over-swirling, which will mix the layers together too much.
5. Bake the bread for 50–65 minutes, tenting loosely with foil about halfway through to prevent the top from over-browning. Bread baked in an 8×4-inch pan takes closer to 65 minutes. Poke the center of the bread with a toothpick. If it comes out clean, the bread is done. Remove from the oven and allow the bread to cool in the pan set on a cooling rack for 1 hour. After that, remove the bread from the pan and let it finish cooling directly on the rack.
6. Drizzle with icing, if using. Slice and serve. Cover and store leftover bread at room temperature for up to 3 days or in the refrigerator for up to 1 week.

Notes

1. Freezing Instructions: For longer storage, you can freeze the glazed or unglazed bread for up to 3 months. See details above the recipe. Allow to thaw overnight in the refrigerator and bring to room temperature before glazing (if needed) and serving.
2. Special Tools (affiliate links): 9×5-inch Loaf Pan or 8×4-inch Loaf Pan | Glass Mixing Bowls | Whisk | Cooling Rack
3. Sour Cream & Milk: I use a mix of sour cream and whole milk here. The crumb is tighter and more tender—you’ll love it. Using all milk creates a thinner batter that can overflow and take much longer to bake. That being said, feel free to use 1 cup of buttermilk instead of the sour cream and whole milk option here. You can make your own DIY version of buttermilk if needed. Add 2 teaspoons of white vinegar or lemon juice to a liquid measuring cup. Then add enough whole milk to the same measuring cup until it reaches 1 cup. (In a pinch, lower fat or nondairy milks work for this soured milk, but the bread won’t taste as rich and moist.) Stir it around and let sit for 5 minutes. The homemade “buttermilk” will be somewhat curdled and ready to use in the recipe.
4. Optional Additional Flavors: Feel free to use the chai spice swirl noted above. Or add 1 cup of peeled, chopped apples to the bread batter or even 1 cup of raisins, chopped walnuts or pecans, or dried/fresh/frozen (do not thaw) cranberries. You can also add 1 Tablespoon of fresh orange zest to the bread batter OR cinnamon sugar swirl. Also, the orange glaze from this cranberry bread would be delicious on this bread.
5. Muffins: Grease a 12-count muffin pan or line with liners. You will need a 2nd pan for 2 additional muffins as this recipe yields around 14. (Or bake in batches.) Prepare cinnamon swirl and batter in steps 2 + 3. Spoon batter evenly into liners, filling each halfway. Sprinkle each with a heaping spoonful of cinnamon sugar. Top with more batter, filling to the top. Sprinkle each with a dusting of cinnamon sugar. Use a knife to swirl the batter/cinnamon sugar in each. Bake the muffins for 5 minutes at 425°F (218°C) then, keeping the muffins in the oven, reduce the oven temperature to 350°F (177°C). Bake for an additional 15-17 minutes or until a toothpick inserted in the center comes out clean. The total time these muffins take in the oven is about 20-22 minutes, give or take. Cool muffins for 5 minutes in the muffin pan, then transfer to a wire rack to continue cooling. Makes 14 muffins.
6. Mini Loaves: Grease a mini loaf pan. Prepare cinnamon swirl and batter in steps 2 + 3. Spoon batter evenly into greased cups, filling each halfway. Sprinkle each with a heaping spoonful of cinnamon sugar. Top with more batter, filling to the top. Sprinkle each with a dusting of cinnamon sugar. Use a knife to swirl the batter/cinnamon sugar in each. Bake at 350°F (177°C) until a toothpick inserted in the center comes out clean. Bake time and yield depends on the size of your mini loaf pan.