The Ultimate Banana Bread
A moist, deeply flavored banana bread made with brown butter, brown sugar and a scoop of sour cream. One bowl, no mixer, and a crackly caramelized top.

Recipe
The Ultimate Banana Bread
A moist, one-bowl banana bread made with brown butter, brown sugar, sour cream and very ripe bananas. Makes one 9x5-inch loaf.
Equipment 9x5-inch metal loaf pan, Small light-colored saucepan, Large mixing bowl, Whisk and silicone spatula, Wire cooling rack
Ingredients
Wet ingredients
- 0.5 cup unsalted butter, 113 g (1 stick), plus extra for the pan
- 340 g very ripe bananas, about 3 large or 4 medium, mostly black, mashed (about 1 1/2 cups)
- 0.75 cup packed light brown sugar, 150 g
- 2 whole large eggs, at room temperature
- 0.33 cup sour cream, 80 g, full-fat
- 2 tsp pure vanilla extract
Dry ingredients
- 220 g all-purpose flour, about 1 3/4 cups, spooned and leveled
- 1 tsp baking soda, check it is fresh
- 0.75 tsp fine salt
- 1 tsp ground cinnamon
Mix-ins and topping
- 0.75 cup walnuts or pecans, 85 g, toasted and roughly chopped (optional)
- 1 whole banana, halved lengthwise, for the top (optional)
- 1 tbsp turbinado sugar, for a crackly top (optional)
Tap Swap on any ingredient to see substitutions and ratios.
Nutrition
- Serving
- 1 slice, 1/10 of the loaf, without nuts
- Calories
- about 300 kcal (approximate)
- Fat
- about 12 g (approximate)
- Carbohydrates
- about 45 g (approximate)
- Protein
- about 4 g (approximate)
Estimated per serving. Total time 75 minutes.
Method
- 1
Heat the oven to 350°F with a rack in the middle. Butter a 9x5-inch loaf pan and line it with a strip of parchment that overhangs the long sides.
- 2
Brown the butter: melt it in a small light-colored saucepan over medium heat, swirling, until it foams, then turns golden with brown specks at the bottom and smells nutty, 4 to 6 minutes. Pour it, specks and all, into a large bowl and let it cool 5 minutes. Watch it closely, because it goes from brown to burnt in under a minute.
- 3
Add the mashed bananas and brown sugar to the butter and whisk well. Whisk in the eggs one at a time, then the sour cream and vanilla, until smooth.
- 4
Sprinkle the flour, baking soda, salt, and cinnamon over the wet mixture. Fold with a spatula just until no dry flour remains. A few lumps are fine. Fold in the nuts, if using.
- 5
Scrape the batter into the pan and smooth it. Lay the banana halves cut side up on top, if using, and sprinkle with turbinado sugar.
- 6
Bake 55 to 65 minutes, tenting with foil if the top darkens before 40 minutes, until a skewer in the center comes out with moist crumbs but no wet batter (about 200 to 205°F inside).
- 7
Cool in the pan for 15 minutes, lift out by the parchment, and cool on a rack at least 30 minutes more before slicing.
The ultimate banana bread is moist, tender, and tastes intensely of banana, with a crackly, caramelized top. This version gets there with four upgrades: bananas that are almost black, butter browned until it smells like toffee, brown sugar for depth, and a scoop of sour cream so the loaf stays moist for days. It's one bowl, no mixer, and very hard to mess up. You'll need about 15 minutes of hands-on work and about 1 hour 15 minutes total, and it makes one 9x5-inch loaf of 10 slices. Difficulty: easy. The full recipe is at the top of the page.
Why brown butter makes the ultimate banana bread
Butter is about 80 percent fat, with water and milk solids making up the rest. Cook it gently and the water boils off while the milk solids toast, turning nutty and caramel-like through browning reactions. It takes 5 minutes and is the single biggest flavor upgrade you can make. It's also the reason this recipe uses melted butter rather than creamed. Melted fat coats the flour and limits gluten, which keeps quick breads tender instead of fluffy and cake-like. Brown sugar adds molasses flavor and extra moisture, and sour cream brings a slight tang that balances the sweetness of very ripe bananas.

Tips and doneness cues
- <strong>Spoon and level the flour.</strong> Scooping straight from the bag can pack in up to 25 percent extra flour and make a dry loaf. Better still, weigh it: 220 g.
- <strong>Check the center, not the top.</strong> The loaf is done when a skewer in the center comes out with a few moist crumbs but no wet batter, or when an instant-read thermometer reads about 200 to 205°F.
- <strong>Tent if it browns fast.</strong> All that sugar browns quickly. If the top is dark by 40 minutes, lay a sheet of foil loosely over it.
- <strong>Cool before slicing.</strong> Let it rest 15 minutes in the pan, then at least 30 minutes on a rack. Cutting too soon is the usual cause of a gummy center.
- <strong>No ripe bananas?</strong> Roast unpeeled bananas on a sheet pan at 300°F for 15 to 20 minutes until the skins are black. They'll be softer and more concentrated, but they don't develop the same sugars as bananas that ripened naturally.
| Banana ripeness | What it looks like | Result in banana bread |
|---|---|---|
| Yellow, a few spots | Firm, mostly yellow | Mild flavor, drier and denser |
| Heavily speckled | More brown than yellow | Good flavor, sweet and moist |
| Mostly or fully black | Soft, fragrant, skin thin | Best: deepest banana flavor |
| Black and leaking | Very soft, liquid in the peel | Still usable. Include the liquid and measure by weight |
| Frozen, then thawed | Brown and watery | Excellent. Keep the liquid and mash it in |
Substitutions and variations
- <strong>Sour cream:</strong> Swap 1 for 1 with plain full-fat Greek yogurt or buttermilk. Buttermilk makes a slightly thinner batter, so bake a few minutes longer.
- <strong>Butter:</strong> Use 1/2 cup neutral oil instead for an even moister, longer-keeping loaf, but you lose the brown butter flavor.
- <strong>Sugar:</strong> Light and dark brown sugar both work. You can use granulated sugar 1 for 1, but the loaf will be paler and a little less moist.
- <strong>Flour:</strong> Replace up to half the all-purpose flour with whole wheat flour for a nuttier loaf. A 1 for 1 gluten-free baking blend with xanthan gum also works.
- <strong>Chocolate chip variation:</strong> Swap the walnuts for 3/4 cup chocolate chips, or use half of each.
- <strong>Muffins:</strong> Divide the batter among 12 lined muffin cups and bake at 350°F for 20 to 24 minutes.
- <strong>Scale it up:</strong> Double the recipe for two loaves. Bake them side by side on the middle rack, rotating once halfway through.
Storage and make-ahead
Banana bread tastes better on day two, once the moisture settles evenly through the crumb. Wrap the cooled loaf tightly and keep it at room temperature for up to 3 days, or in the fridge for up to a week. To freeze, wrap whole or in slices for up to 3 months. Toast slices straight from frozen, or thaw at room temperature. A toasted slice with salted butter makes a great breakfast. If you want something with more staying power, pair it with our high-protein Greek yogurt bowl, or read whether breakfast is really the most important meal of the day.
More from the Yumlore bakery: our fudgy brownies from scratch, soft and chewy chocolate chip cookies, and a no-bake cheesecake that sets every time.
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