Cinnamon Swirl Banana Bread with Roasted Banana Top

Cinnamon Swirl Banana Bread

Thick slices of this banana bread show a dark cinnamon-sugar ribbon through the tender banana crumb. Two banana halves bake on top, softening and browning beside the cracked, lightly sugared crust. Use very ripe bananas for the batter, but choose a firmer ripe banana for the topping so the halves stay intact. Because the topping and pan can affect bake time, check the center of the loaf rather than relying on the clock alone.

Yield: 1 loaf, about 10 thick slices. Prep: 20 minutes. Bake: approximately 55–70 minutes. Total: approximately 2 hours 15 minutes to 2 hours 45 minutes, including cooling.

Ingredients for Cinnamon Swirl Banana Bread

Banana bread batter

• About 3 medium very ripe bananas, mashed to measure 1 1/4 cups (300g)
• 1 3/4 cups all-purpose flour, spooned and leveled (210g)
• 1/2 cup packed light brown sugar (100g)
• 1/3 cup neutral oil (about 75g), plus a little oil or baking spray for the pan
• 2 large eggs
• 1 teaspoon vanilla extract
• 1 teaspoon baking soda
• 1/2 teaspoon fine salt

Cinnamon swirl

• 1/4 cup packed light brown sugar (50g)
• 2 teaspoons ground cinnamon

Banana topping

• 1 medium ripe but firm banana, peeled and halved lengthwise
• 1 tablespoon granulated sugar

How to Bake Cinnamon Swirl Banana Bread

1. Prepare the oven and pan: Fully preheat the oven to 350°F (175°C) with a rack in the center. Grease a 9-by-5-inch light-colored metal loaf pan. Line the bottom and long sides with parchment, leaving overhang to lift out the loaf.
2. Mix the cinnamon sugar: Stir together the 1/4 cup brown sugar and cinnamon in a small bowl. Keep the granulated sugar for the topping separate.
3. Make the batter: Whisk the mashed bananas, 1/2 cup brown sugar, oil, eggs, and vanilla together. In another bowl, whisk the flour, baking soda, and salt. Fold the dry ingredients into the banana mixture just until no dry flour remains. The batter should be thick and spoonable; prolonged mixing can make the crumb tough.
4. Build the swirl: Spread half the batter in the pan. Scatter the cinnamon sugar over it, leaving a narrow border near the pan edges, then cover with the remaining batter. Draw a butter knife or thin skewer through the batter in one or two gentle lengthwise passes. Do not blend the cinnamon layer completely into the batter.
5. Add the topping: Lay the banana halves on the batter, cut sides up and parallel to the long sides of the pan. Press them in lightly without burying them. Sprinkle the granulated sugar over the bananas and exposed batter.
6. Bake: Bake uncovered, starting to check at 50 minutes. Expect approximately 55–70 minutes, but continue baking if the center needs longer. The loaf should be browned and risen, with a set central crack. Insert a tester into the central bread crumb, avoiding the banana halves and cinnamon seam when possible. It should come out without wet batter; a little cinnamon-sugar residue is fine. If the top darkens before the center is done, tent it loosely with foil. Rotate the pan partway through baking if your oven heats unevenly.
7. Cool and slice: Cool in the pan for about 20 minutes, then lift the loaf onto a wire rack using the parchment. Cool for another 40–60 minutes, until thick slices hold together without crumbling or compressing.

Choosing Bananas for the Batter and Top

Measure the mashed bananas for the batter; three bananas may yield more or less than 1 1/4 cups. They should be very ripe and soft. The topping banana is separate and should be ripe but firm enough to halve and transfer without breaking.

How to Keep the Cinnamon Ribbon Distinct

Leaving a narrow border around the cinnamon sugar helps enclose it inside the loaf. Once the top layer of batter is in place, one or two gentle knife passes make irregular streaks while preserving a visible ribbon. Too much swirling disperses the filling through the crumb.

How to Tell When the Loaf Is Done

A tester pushed through a banana half or the cinnamon seam can look sticky even when the surrounding bread is baked. Retest a nearby spot in the central crumb: wet batter means the loaf needs more time, while a little cinnamon residue is acceptable. A dark metal or glass pan may brown differently from a light-colored metal pan, so use the center test rather than assuming the same finish time.

Serving and Variations

Serve thick slices plain, with softened butter, or gently warmed. For a richer batter, replace the oil with the same volume of melted butter; the loaf may be slightly denser. For a separate crumb-topped variation, try coffee cake banana bread with cinnamon-walnut streusel.

Storage and Freezing

Cool the loaf completely before wrapping it tightly. Keep it at room temperature for up to 2 days. In a warm kitchen, refrigerate the wrapped loaf and use it within about 5 days; let slices come to room temperature before serving if desired.

To freeze, separate fully cooled slices with parchment and pack them in a freezer-safe bag for up to 3 months. Thaw at room temperature, then gently warm slices in a microwave or oven if desired.

Nutrition

Approximate nutrition per thick slice, based on 10 slices: 255 calories, 4g protein, 9g fat, and 42g carbohydrates. Approximate values per 100g of baked bread: 300 calories, 5g protein, 10g fat, and 50g carbohydrates. Values are estimates; slice size and moisture lost during baking will affect them.