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Brown Butter Walnut Banana Bread
Browning the butter drives off water and toasts the milk solids, giving this loaf a deep, nutty backbone that stands up to the sweetness of overripe fruit.
- Prep
- 20 minutes
- Cook
- 65 minutes
- Total
- 1 hour 25 minutes
- Yield
- one 9x5-inch loaf
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The common failure mode of banana bread is a pale, gummy crumb that tastes entirely of sugar and raw flour. This happens when the batter is overmixed and underbaked in a pan that is too small. Using a standard 9x5-inch loaf pan and folding the wet and dry ingredients together just until the last streak of flour disappears ensures a tender, fully baked center.
Browning the butter before mixing the batter introduces a complex, toasted flavor that complements the walnuts and cuts through the aggressive sweetness of heavily speckled bananas. The heat of the butter also slightly cooks the mashed fruit, deepening its flavor before the loaf even enters the oven. A combination of brown and white sugars provides both moisture and structure.
This bread requires a full hour in the oven and at least another hour to cool in the pan before slicing. Cutting into it while hot will compress the crumb and make it seem underbaked. It keeps well at room temperature for up to four days when wrapped tightly, and the flavor often improves on the second day as the moisture redistributes.
What you need
Ingredients
Measurements
Metric converts only measures that are mathematically safe. Density-dependent cups stay as Nicole wrote them.
Scaling this one
This recipe is written to fill one 9x5-inch loaf, so there is no batch slider: doubling the quantities would not give you a deeper pan, it would give you two of them — and the bake time and temperature below would no longer be right. To make more, run the recipe twice in separate tins rather than crowding one.
- 1/2 cup (1 stick) unsalted butter
- 1 1/2 cups all-purpose flour, spooned and leveled
- 1 teaspoon baking soda
- 1/2 teaspoon kosher salt
- 3 large, very ripe bananas, mashed (about 1 1/2 cups)
- 1/2 cup packed dark brown sugar
- 1/2 cup granulated sugar
- 2 large eggs, room temperature
- 1 teaspoon vanilla extract
- 1 cup chopped walnuts, toasted
How it goes
Method
Read the whole thing once before you start. Nothing here is difficult, but the timing is unforgiving at the end.
Brown the butter
Melt the butter in a light-colored saucepan over medium heat. Swirl the pan constantly as the butter foams and sputters. When the sputtering stops and the milk solids at the bottom turn a deep amber color, immediately pour the butter into a large heatproof bowl to stop the cooking. Let it cool for 10 minutes.
Prepare the oven and pan
Preheat the oven to 350°F. Grease a 9x5-inch metal loaf pan with butter or nonstick spray, then line the bottom and long sides with a sling of parchment paper, leaving an overhang for easy removal.
Whisk the dry ingredients
In a medium bowl, whisk together the flour, baking soda, and kosher salt until thoroughly combined. This ensures the leavening is evenly distributed, preventing large tunnels in the baked crumb.
Combine the wet ingredients
To the cooled brown butter, add the mashed bananas, brown sugar, granulated sugar, eggs, and vanilla extract. Whisk vigorously until the mixture is completely smooth and slightly lighter in color.
Fold the batter
Pour the dry ingredients into the wet mixture. Using a rubber spatula, fold gently until just a few streaks of flour remain. Add the toasted walnuts and fold two or three more times. Do not overmix, or the bread will be tough.
Bake the loaf
Scrape the batter into the prepared pan and smooth the top. Bake for 60 to 70 minutes, or until a wooden skewer inserted into the center comes out clean or with a few moist crumbs attached. The top should be deeply browned and cracked down the middle.
Cool completely
Let the bread cool in the pan on a wire rack for 15 minutes. Use the parchment overhang to lift the loaf out of the pan and transfer it directly to the rack. Cool completely before slicing to allow the crumb to set.
On the bench
Equipment
All 2 of these change the result. Nothing here is a brand recommendation — the spec is what matters.
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Light-colored saucepan
You must see the milk solids change color to judge precisely when brown butter is done; a dark pan hides that visual cue and risks burning.
- What matters
- Light-colored (enamel or stainless) 2- to 3-quart saucepan with straight sides so you can watch the milk solids.
9x5-inch metal loaf pan
A 9x5 metal pan conducts heat predictably for the specified bake time and works with a parchment sling to release the loaf cleanly.
- What matters
- Standard 9x5-inch metal loaf pan (aluminum or steel) that fits a parchment sling and tolerates 350°F.
- Search for
- “9x5-inch metal loaf pan” (paid link)
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Cook's notes
What we would tell a friend
- Bananas must be heavily speckled with black or entirely black for the correct moisture and sugar content. Yellow bananas will yield a dry, bland loaf.
- Toasting the walnuts in a 350°F oven for 8 minutes before chopping them brings out their essential oils and prevents them from tasting raw in the finished bread.
- If the top of the loaf is browning too quickly at the 45-minute mark, tent it loosely with aluminum foil for the remainder of the baking time.
- To freeze, wrap the completely cooled loaf tightly in plastic wrap, then in aluminum foil. Thaw overnight at room temperature before serving.
From the kitchen
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