Extra-Moist Sour Cream Banana Bread
This banana bread stays incredibly moist for days, thanks to a generous scoop of sour cream and plenty of ripe bananas. The crumb is tender and soft, with a deep banana flavor that never tastes dry.
It’s the recipe I turn to when I want a simple loaf that works every time. No mixer required, just two bowls and a fork.
Why This Banana Bread Stays Moist for Days
The sour cream adds fat and acidity, keeping the crumb tender and preventing it from drying out, even on day three. The extra richness means you don’t need to smother it with butter to enjoy a slice.
I’ve tested this with melted butter and oil, but the combo of melted butter and sour cream gives it a rich flavor and that trustworthy softness we all want in banana bread. It also fills the kitchen with the coziest, sweet banana smell while it bakes.
Ingredients
- 3 large very ripe bananas: the spottier, the better; they mash easily and taste sweeter.
- 1/2 cup (115g) unsalted butter, melted: plus a little for greasing the pan.
- 3/4 cup (150g) granulated sugar: light brown sugar works too, for a deeper caramel note.
- 2 large eggs: at room temperature.
- 1 tsp vanilla extract.
- 1/2 cup (120g) full-fat sour cream: the secret to an extra-moist crumb.
- 1 1/2 cups (190g) all-purpose flour: spooned and leveled, so you don’t end up with a dry loaf.
- 1 tsp baking soda.
- 1/2 tsp fine sea salt.
- 1/2 cup (60g) chopped walnuts or pecans (optional).
Variations / Substitutions
- Unsalted butter: swap with an equal amount of melted coconut oil or neutral vegetable oil. The flavor shifts slightly but stays moist.
- Sour cream: use full-fat plain Greek yogurt in the same amount. The loaf will be a touch tangier and just as tender.
- Sugar: replace up to half the granulated sugar with packed light brown sugar for a richer, molasses-tinged loaf.
- Add-ins: fold 1/2 cup chocolate chips, dried cranberries, or toasted coconut into the batter along with the dry ingredients.
- Dairy-free: use melted coconut oil instead of butter and a thick unsweetened plant-based yogurt for the sour cream.
For a pumpkin twist, try my Pumpkin Banana Bread.
How to Make Extra-Moist Banana Bread
Step 1: Mash the Bananas
Preheat your oven to 350°F (175°C) and grease a 9×5-inch loaf pan, then line it with parchment paper. Peel the 3 bananas, put them in a large bowl, and mash with a fork until mostly smooth. A few small lumps are fine.
The bananas should measure about 1 1/4 to 1 1/2 cups once mashed. That’s the sweet spot for a moist loaf without turning gummy.
Step 2: Whisk the Wet Ingredients
To the same bowl, add the 1/2 cup melted butter, 3/4 cup sugar, 2 eggs, 1 tsp vanilla, and 1/2 cup sour cream. Whisk until the mixture looks smooth and glossy, with no streaks of egg white.
The warm melted butter helps dissolve the sugar a bit, which makes the crumb more tender. If your eggs are cold, the butter may firm up slightly, that’s okay. Just whisk until everything comes together.
Step 3: Mix the Dry Ingredients
In a separate medium bowl, whisk together the 1 1/2 cups flour, 1 tsp baking soda, and 1/2 tsp salt until well combined.
Whisking the dry ingredients by hand aerates the flour and distributes the leavening evenly. It takes 20 seconds and prevents uneven pockets of baking soda in the loaf.
Step 4: Fold the Batter Together
Pour the dry mixture into the wet banana mixture. Using a rubber spatula, fold gently until you no longer see streaks of flour. Stop as soon as the last bit of flour disappears. If you’re using nuts, fold them in now.
The batter will be thick and a little lumpy from the bananas. That’s exactly how it should look. A few floury streaks are better than a perfectly smooth batter that’s been stirred too much, because overmixing will make the bread tough.
Step 5: Bake, Cool, and Slice
Scrape the batter into the prepared loaf pan and smooth the top. Bake for 55 to 65 minutes, until the top is deeply golden and a toothpick inserted in the center comes out with just a few moist crumbs. Let the loaf cool in the pan for 10 minutes, then lift it out by the parchment and transfer to a wire rack to cool completely before slicing.
The crack down the middle is a sign of a well-risen loaf. Slice it once it’s completely cool, and the crumb will be tender and clean, never gummy.
A Few Notes Before You Start
- Bananas not ripe enough?: Place them in a 300°F oven for 15 minutes until the skins turn black, then cool and use. It won’t match the depth of naturally spotted bananas, but it works in a hurry.
- Measure the flour carefully.: Fluff it with a spoon, scoop it into the cup, and level it off. Scooping straight from the bag packs in too much flour and leads to a dry loaf.
- Let it cool fully.: Waiting until the loaf is completely cool on the wire rack lets the interior set properly. Cutting into it warm can make the slices crumble.
Bake times will shift depending on the size of your pan:
| Pan Type | Bake Time at 350°F |
|---|---|
| 9×5-inch loaf pan | 55 to 65 minutes |
| 8×4-inch loaf pan | 50 to 60 minutes |
| Standard muffin tin | 20 to 25 minutes |
For muffins, fill each cup about three-quarters full.
Storing Leftover Banana Bread
- Room temperature: Wrap the loaf tightly in plastic wrap or store in an airtight container for up to 3 days.
- Refrigerate: Keep it wrapped in the fridge for up to 5 days, but note the cold can firm the crumb slightly.
- Reheating: Warm individual slices in the microwave for 10 to 15 seconds, or toast them in a skillet with a little butter.
- Freeze: Wrap the whole cooled loaf or individual slices well in plastic and foil, then freeze for up to 3 months. Thaw at room temperature.
Frequently Asked Questions
Can I use frozen bananas?
Yes, thaw them completely and drain off any excess liquid before mashing. Too much liquid will throw off the batter balance.
Can I make this banana bread gluten-free?
Substitute a 1:1 gluten-free flour blend that contains xanthan gum. The texture will still be moist and tender.
Can I reduce the sugar?
You can cut the sugar to 1/2 cup (100g) without ruining the texture. The loaf will be less sweet and slightly paler on top.
What if my banana bread sinks in the middle?
This usually happens when the batter is overmixed or the oven door is opened too early. Also check that your baking soda is fresh.
Extra-Moist Banana Bread Recipe
Ingredients
Method
- Preheat oven to 350°F (175°C) and grease a 9×5-inch loaf pan. Mash the bananas in a large bowl.
- Whisk in the melted butter, sugar, eggs, vanilla, and sour cream until smooth.
- In a separate bowl, whisk together the flour, baking soda, and salt.
- Gently fold the dry ingredients into the wet mixture until just combined, then fold in nuts if using.
- Scrape batter into the prepared pan and bake for 55 to 65 minutes, until a toothpick comes out with moist crumbs. Cool in the pan 10 minutes, then transfer to a wire rack to cool completely before slicing.
