Brown Butter Streusel Banana Bread Recipe
This one-bowl banana bread recipe features nutty browned butter, tangy sour cream, and a crunchy cinnamon streusel. It's the best banana bread for a moist, rich crumb.
This brown butter banana bread recipe is the only one you need if you're tired of loaves that turn out gummy or bland. By browning the butter first, we introduce a deep, toffee-like complexity that transforms this from a standard snack into a bakery-level dessert.
The secret to why this is the best banana bread lies in the combination of full-fat sour cream and overripe, blackened bananas. It creates a tender, tight crumb that stays moist for days on the counter. We’ve topped it with a thick layer of cinnamon-sugar streusel because the contrast between the soft cake and the crunchy lid is non-negotiable.
Best of all, this is a surprisingly easy banana bread to pull together. You only need one bowl for the batter, and since we use melted brown butter, there is no need to wait for ingredients to reach room temperature or drag out a heavy stand mixer.
Ingredients
Cinnamon Streusel Topping
- 1/2 cup (65g) all-purpose flour
- 1/3 cup (65g) light brown sugar, packed
- 1 teaspoon ground cinnamon
- 3 tablespoons (42g) unsalted butter, melted
Banana Bread Batter
- 1/2 cup (113g) unsalted butter
- 1 1/2 cups (approx. 340g) very ripe mashed bananas (about 3 large)
- 3/4 cup (150g) light brown sugar, packed
- 1 large egg, room temperature
- 1/4 cup (60g) full-fat sour cream or Greek yogurt
- 1 1/2 teaspoons vanilla extract
- 1 1/2 cups (190g) all-purpose flour
- 1 teaspoon baking soda
- 1/2 teaspoon kosher salt
- 1/2 teaspoon ground cinnamon
Instructions
- 1
Preheat your oven to 350°F (175°C) and grease a 9x5-inch loaf pan with butter or non-stick spray, lining the bottom with parchment paper for easy removal.
- 2
Brown the butter in a small saucepan over medium heat, swirling occasionally until the milk solids turn golden brown and smell nutty; immediately pour into a large mixing bowl and let cool for 5 minutes.
- 3
Prepare the streusel by mixing the flour, brown sugar, and cinnamon in a small bowl, then stir in the 3 tablespoons of melted butter until crumbly clumps form; set aside.
- 4
Whisk the mashed bananas, brown sugar, egg, sour cream, and vanilla into the bowl with the browned butter until smooth and well combined.
- 5
Add the flour, baking soda, salt, and cinnamon directly into the wet ingredients, stirring gently with a spatula until just combined—do not overmix.
- 6
Pour the batter into the prepared loaf pan and smooth the top with your spatula.
- 7
Sprinkle the streusel mixture evenly over the batter, pressing down very lightly so it adheres.
- 8
Bake for 55 to 65 minutes, or until a skewer inserted into the center comes out clean or with just a few moist crumbs.
- 9
Cool the bread in the pan for at least 15 minutes before transferring to a wire rack to cool completely before slicing.
Tips
- → Use bananas that are covered in black spots or completely brown; yellow bananas won't provide the necessary sugar content or moisture.
- → Don't skip the sour cream. The acidity reacts with the baking soda to ensure a high rise and prevents the loaf from feeling heavy or dense.
- → If the streusel starts browning too quickly before the center is cooked, tent the pan loosely with aluminum foil for the last 15 minutes of baking.
FAQ
How do I make sure my banana bread isn't gummy?
Gummy bread usually comes from overmixing the batter once the flour is added, which develops too much gluten. Stir just until the flour streaks disappear.
Can I freeze this banana bread recipe?
Yes! Wrap the cooled loaf tightly in plastic wrap and then foil. It will stay fresh in the freezer for up to 3 months. Thaw at room temperature.
Why does my banana bread sink in the middle?
This often happens if the oven door is opened too early or if the loaf is underbaked. Use a wooden skewer to check that the very center is set before removing from the oven.
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