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Why It Works
- Caramelizing the bananas drives off excess moisture and builds deep, concentrated banana flavor.
- Starting the bake at high heat rapidly generates steam, causing the batter to expand quickly and form a domed top.
- Dropping the oven temperature partway through baking ensures the centers cook through without burning or over-browning the muffins.
There’s something inherently comforting about a muffin. It exists in that cozy space between breakfast and dessert—quick enough to grab on your way out the door, rich enough to feel satisfying, and just sweet enough to feel like a treat. It’s portable, unfussy, and deeply familiar. But just because the joy of a muffin is simple doesn’t mean it has to be basic.
This banana oatmeal muffin is anything but boring. Developed by my colleague Julia Levy from our Birmingham, Alabama test kitchen, it’s plush and moist, full of concentrated banana flavor, and finished with a crisp, golden oat streusel.
Worth the Extra Bananas in the Batter
Julia wanted a banana-oat muffin that maximized banana flavor. Rather than having you mash all the ripe bananas straight into the batter like most recipes call for, this technique borrows a smart move from our senior culinary editor, Leah’s, easy banana bread: caramelizing the bananas first. Four of them are sliced and browned in butter until the mixture is thick, jammy, and deeply golden.
This step drives off excess moisture, concentrating the flavors in the process, laying the foundation for a batter that tastes unmistakably and intensely of banana. The remaining butter is browned in the same skillet to layer in nutty depth. The softened bananas go back into the pan and cook down further in the browned butter, breaking apart and caramelizing until they form a fragrant, rich mash that smells like bananas crossed with toffee. Off heat, brown sugar is stirred in to mirror the ripe sweetness of the fruit and push those sweet notes even further.
To balance the concentrated banana paste and add moisture back in, Julia mashes the remaining raw bananas into the batter along with a bit of sour cream, which brightens and offsets the buttery richness of the caramelized mixture. But that’s not all the sour cream is doing—it also reacts with baking soda to lift the batter and keep the crumb soft and tender.
When it comes to baking, the muffins start off in a hot oven, where a burst of steam gives them an instant lift, which helps form those coveted domed tops. After five minutes, the temperature is dropped to let the centers bake through gently, so they stay moist without over-browning or drying out.
The Crunchy Topping
The oat streusel gets its own moment to shine atop the muffin. Made with melted butter, brown sugar, flour, and just enough salt to keep things balanced, it bakes into a craggy, crisp, golden topping. The oats give it body and nubbiness, so it doesn’t melt into the muffin top. Generous but not over the top, it adds texture and sweetness without tipping things into dessert territory.
Serious Eats/ Morgan Hunt Glaze
Your New Favorite Grab-and-Go Muffin
Between the deeply caramelized banana base, browned butter, and crisp oat streusel on top, these muffins have just the right amount of sweetness and character to elevate them far beyond your average grab-and-go bake. They’re tender, toasty, and unabashed in their banana-ness—and they just might become your new favorite morning treat.
This recipe was developed by Julia Levy; the headnote was written by Laila Ibrahim.
Serious Eats / Morgan Hunt Glaze, Prop Stylist: Christina Daley, Food Stylist: Emily Nabors Hall
The Beautiful Banana Muffins You’ll Want for School Mornings, Coffee Breaks, and Everything in Between
Cook Mode
(Keep screen awake)
For the Muffins:
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12 muffin paper liners
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8 ounces all-purpose flour (226 g; 1 3/4 cups)
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2 3/4 ounces old-fashioned rolled oats (76 g; 3/4 cup)
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1 teaspoon Diamond Crystal kosher salt; if using table salt, use half as much by volume
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1 teaspoon baking soda
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1/2 teaspoon baking powder
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6 very ripe bananaspeeled, divided
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3 ounces sour cream (85 g; 1/3 cup), at room temperature
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8 tablespoons (113 g) unsalted butterdivided
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7 1/2 ounces light brown sugar (213 g; 1 lightly packed cup)
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2 large eggsat room temperature
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2 teaspoons vanilla extract
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2 1/4 ounces chopped toasted walnuts or pecans (63 g; 1/2 cup), optional
For the Streusel:
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1 ounce all-purpose flour (28 g; about 1/4 cup)
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1 3/4 ounces light brown sugar (50 g; about 1/4 packed cup)
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1 ounce old-fashioned rolled oats (28 g; 1/4 cup)
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2 tablespoons (28 g) unsalted buttermelted
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1/4 teaspoon Diamond Crystal kosher salt; for table salt, use half as much by volume
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Adjust oven rack to middle position and heat oven to 400℉ (175℃). Line a 12-cup muffin tin with paper liners.
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In a medium bowl, whisk flour, oats, salt, baking soda, and baking powder until combined; set aside.
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In a large bowl, use a potato masher or large fork to mash 2 whole bananas and sour cream together until fairly smooth; set aside. Halve remaining 4 bananas crosswise, then halve lengthwise (you should have 16 banana pieces total); set aside.
Serious Eats / Morgan Hunt Glaze
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In a large nonstick or cast-iron skillet set over medium-high heat, melt 2 tablespoons (28 g) butter. Add banana slices, flat-side down, and cook until golden brown and softened, flipping as needed, 5 to 7 minutes. Transfer to a separate bowl.
Serious Eats / Morgan Hunt Glaze
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In the now-empty skillet, add remaining 6 tablespoons (85 g) butter, and cook over medium-high heat, stirring constantly with a rubber spatula, until butter is light golden brown and has a nutty aroma, 2 to 4 minutes. Return browned bananas to skillet, and continue to cook, stirring and flipping banana mixture frequently, until bananas are mostly broken down and the mixture turns dark golden brown and has a deep caramelized nutty banana aroma, 6 to 8 minutes. Off heat, stir in brown sugar, whisking constantly, until sugar is fully dissolved, about 1 minute. Transfer banana mixture back to the now-empty bowl. Let sit until slightly cooled, about 10 minutes.
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For the Streusel: While bananas cool, make streusel topping: In a medium bowl, stir together flour, brown sugar, oats, melted butter, and salt until mixture resembles wet sand; set aside.
Serious Eats / Morgan Hunt Glaze
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Stir cooled banana mixture into mashed banana-sour cream mixture. Using a potato masher or large fork, again mash the banana mixture until mostly smooth. Whisk in eggs and vanilla until combined. Using a spatula, stir in flour mixture until just combined. Fold in walnuts or pecans, if using. Evenly divide batter between prepared muffin cups (about 1/4 cup per muffin). Divide streusel evenly over muffins (about 1 tablespoon per muffin).
Serious Eats / Morgan Hunt Glaze
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Bake for 5 minutes, then reduce heat to 350°F (175°C) and continue baking until muffins are domed, golden brown, and a toothpick or cake tester inserted into the center comes out with a few moist crumbs, 15 to 18 minutes.
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Transfer to a wire rack and let stand in tin for 5 minutes. Carefully remove muffins from tin and allow to cool completely on wire rack, about 20 minutes. Serve or transfer to a storage container.
Serious Eats/ Morgan Hunt Glaze
Special Equipment
Large nonstick or cast-iron skillet, 12-cup muffin panmuffin liners, toothpick or cake tester, wire rack
Make-Ahead and Storage
The streusel can be made up to 1 day in advance and refrigerated in an airtight container until ready to use.
Once completely cooled, muffins can be stored at room temperature in an airtight container for up to 3 days.
To freeze muffins, arrange them in a single layer on a 9- by 13-inch rimmed baking sheet. Once frozen, transfer to a zip-top bag. Alternatively, muffins can be wrapped individually in plastic wrap, followed by aluminum foil. Muffins can be frozen for up to 2 months. Let muffins thaw in the fridge overnight before serving.
Muffins can be served cold, at room temperature, or gently reheated in a microwave or 325°F (160°C) oven before serving.