Name: Sourdough Banana Cinnamon Rolls With Brown Sugar Walnut Filling
Prep time: 30 min
Cook time: 25 min
Total time: 11 min
Ingredients: 215 g mashed banana (about 2 medium); 65 g active sourdough starter; 65 g milk; 70 g sugar; 1 large egg; 480 g bread flour; 5 g salt; 113 g butter (room-temperature, plus 4 tbsp more for filling); 1/2 cup brown sugar; 1 tsp ground cinnamon; 1/4 cup chopped walnuts or pecans (optional but recommended); 3 oz softened cream cheese; 1/2 tsp vanilla extract; 1 cup powdered sugar

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If you’ve ever wished banana bread and cinnamon rolls could have a baby, these soft, naturally leavened rolls are your answer—with a brown sugar walnut filling and cream cheese frosting that make them feel like a special breakfast without the fuss.

Why This Recipe Works

Sourdough starter does the heavy lifting: The naturally fermented dough rises slowly overnight, developing deep flavor and a tender crumb without commercial yeast.
Banana adds moisture and richness: Mashed banana keeps the dough soft and adds a subtle sweetness that plays beautifully with cinnamon and walnuts.
Make-ahead friendly: Most of the work happens while you sleep; just shape, rise, and bake in the morning for a cozy breakfast that feels special.

Grocery List (& Shortcuts)

Main Players

215 g mashed banana (about 2 medium)
65 g active sourdough starter
65 g milk
70 g sugar
1 large egg
480 g bread flour
5 g salt
113 g (1 stick) room-temperature butter, plus 4 tbsp more for filling
1/2 cup brown sugar
1 tsp ground cinnamon
1/4 cup chopped walnuts or pecans (optional but recommended)
3 oz softened cream cheese
1/2 tsp vanilla extract
1 cup powdered sugar

Smart Shortcut: Don’t have an active sourdough starter? You can use a well-fed starter straight from the fridge—just give it a few hours at room temperature to perk up before mixing. No starter at all? Swap in 60 g of active dry yeast dissolved in warm milk (though you’ll lose that signature sourdough tang).

Substitutions: Pecans work just as well as walnuts. Skip the nuts entirely if you prefer. For the frosting, cream cheese is non-negotiable for that tang, but you can use salted butter if unsalted isn’t on hand.

Step-by-Step

Mix & Rest

Whisk your active sourdough starter and milk together in a large bowl until combined. Add mashed banana, sugar, and egg; whisk until smooth. Stir in flour and salt until a shaggy dough forms—don’t worry about lumps.

Melt the stick of butter and let it cool until it’s no longer hot to the touch (this matters—hot butter can kill the starter). Mix it into the dough until fully incorporated. Cover the bowl with a damp cloth and rest for 30 minutes.

Develop & Ferment

Knead the dough in a stand mixer fitted with a dough hook on medium speed for about 10 minutes, until it’s smooth, elastic, and pulls cleanly away from the bowl sides. (No mixer? Perform three sets of stretch-and-folds by hand—this builds strength without overworking.) Cover the bowl again with a damp cloth and bulk ferment at room temperature (around 70–72°F) for 8–9 hours, or overnight. The dough should rise to nearly double its original size. (Cooler kitchen? Add time. Warmer? Subtract time.)

Shape & Rise

Lightly flour your work surface. Turn out the dough and pat it into a rough rectangle. Roll it out to a 13×15 inch rectangle using a floured rolling pin.

Mix brown sugar and cinnamon in a small bowl. Spread the 4 tbsp room-temperature butter over the dough, leaving a 1-inch margin on one short end (this helps seal the roll). Sprinkle the cinnamon-sugar mixture evenly over the butter, then scatter walnuts if using.

Roll the dough tightly starting from the opposite end, applying gentle, even pressure. Wet the margin with a little water, seal the seam, and let it rest seam-side down for a minute. Cut the log into 10 equal rolls using a sharp, non-serrated knife (a bench scraper works great too).

Place rolls cut-side up in a 9×13 inch baking pan. Cover with a damp cloth and let rise at room temperature for about 2 hours, until they’re puffy and nearly touching—they don’t need to double, just look soft and ready.

Bake & Frost

Preheat your oven to 350°F. Bake the rolls on the center rack for 25–30 minutes, until golden brown on top and a toothpick inserted into the center comes out clean.

While they bake, whip together softened cream cheese, 4 tbsp butter, vanilla, and powdered sugar until fluffy. Let the rolls cool for 15 minutes, then spread or drizzle the frosting generously over the warm rolls—it’ll melt slightly into all those cinnamon-sugar crevices.

Riley’s Tips

Texture magic: The key to soft, tender rolls is not overbaking. Pull them out when the tops are golden and a toothpick comes out clean—they’ll continue cooking slightly as they cool. Underbaked is better than dry here.
Oops, your dough is too warm? If your kitchen is hot and the dough is rising faster than expected, pop the bulk ferment bowl in the fridge for a few hours to slow things down. Sourdough is forgiving—it just needs time, not speed.
Make-ahead win: Shape the rolls, cover them, and refrigerate overnight instead of doing the 2-hour final rise at room temperature. In the morning, let them come to room temp (about 1–2 hours) before baking. This actually deepens the banana-cinnamon flavor.

Storage & Leftovers

Fridge: Store cooled rolls in an airtight container for up to 4 days. Reheat gently in a 300°F oven for 10 minutes, or microwave for 20–30 seconds per roll.

Freezer: Freeze baked rolls (frosted or unfrosted) in a freezer-safe container for up to 3 months. Thaw at room temperature for 1–2 hours, then warm in a low oven if you’d like them fresh-baked warm.

Pro move: Freeze unfrosted rolls and add the cream cheese frosting after thawing—it stays fresher that way.

FAQ

Do I really need a sourdough starter? Yes, it’s what makes these rolls special—the slow fermentation develops flavor and keeps the crumb tender. If you don’t have one, you can make it in about 5–7 days, or swap in instant yeast (though you’ll lose the sourdough tang and the overnight ferment won’t work the same way).

Can I use frozen banana? Absolutely. Thaw it completely and drain any excess liquid before mashing. You want about 215 g of mashed banana, so adjust if needed.

What if my rolls don’t rise enough? Sourdough rises more slowly than commercial yeast dough. Give them the full 2 hours for the final rise, and if your kitchen is cool, they may need a bit longer. They’re ready when they look puffy and soft, not necessarily doubled in size.

Can I make these without walnuts? Completely. The rolls are delicious on their own—the walnuts just add a nice texture contrast and nuttiness, but they’re optional.

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Save This Recipe & Tell Me How It Went!

Pull up a chair, bookmark this one, and come back to tell me how your sourdough banana cinnamon rolls turned out. Did you make them ahead? Try a different nut? I’d love to hear what you loved about them—and if you have questions, drop them in the comments. There’s nothing quite like a warm, frosted roll fresh from the oven on a cozy morning.