Sour cream banana bread bakes up extra moist and tender, with a hint of tang and a fine, soft crumb, and it comes together in about 1 hour 40 minutes.
The batter gets a surprise ingredient: rolled oats blended into a fine powder, which adds a gentle nutty flavor and keeps the loaf moist for days. Toasted nuts and a pinch of warm spice round out the flavor.
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Why This Sour Cream Banana Bread Recipe Works
Sour cream adds fat and acid, which softens the gluten and gives the loaf a plush crumb that stays moist long after baking.
Blending the oats into flour adds body and a mild toasty note without making the bread heavy, and it also gives the loaf a pleasant, slightly chewy bite.
A mix of brown and white sugar balances caramel depth with clean sweetness, while cinnamon, nutmeg, and cloves add a subtle bakery style warmth.
Ingredients for Sour Cream Banana Bread
- 1/2 cup unsalted butter, softened
- 1/2 cup packed brown sugar
- 1/2 cup granulated sugar
- 2 large eggs, at room temperature
- 2 teaspoons vanilla extract
- 1 cup mashed ripe banana (about 9 ounces, or 2 1/2 medium bananas)
- 1/2 cup sour cream
- 1 cup all purpose flour, spooned and leveled
- 1/2 cup old fashioned oats, blended into a fine powder
- 1/2 teaspoon baking soda
- 1 teaspoon baking powder
- 1/2 teaspoon kosher salt
- 1/4 teaspoon ground cinnamon
- 1/8 teaspoon ground nutmeg
- 1/8 teaspoon ground cloves
- 1/2 cup toasted chopped pecans or walnuts (optional)
Bananas: Mash them well and measure exactly 1 cup, since extra fruit makes the loaf gummy.
Sour cream: Use full fat sour cream at room temperature so it blends in smoothly.
Oat flour: Blend the oats until powdery. Whole flakes will make the crumb coarse.
How to Make Sour Cream Banana Bread
1. Prep the oven and pan. Heat the oven to 350 degrees F. Spray a 9×5 inch loaf pan with cooking spray or line it with parchment.
2. Toast the nuts. If using nuts, toast them on a baking sheet for 5 to 7 minutes until fragrant, then let them cool.
3. Cream the butter and sugars. Beat the butter with the brown and granulated sugars for about 2 minutes until light and fluffy.
4. Add eggs and banana. Beat in the eggs and vanilla, then fold in the mashed banana until combined.
5. Combine the dry ingredients. Whisk the flour, oat flour, baking soda, baking powder, salt, and spices together in a bowl.
6. Fold it all together. Add the dry mixture to the batter and stir gently, then fold in the sour cream and nuts until just combined.
7. Bake. Pour the batter into the pan, smooth the top, and bake for 55 to 60 minutes, until a toothpick comes out clean or with a few moist crumbs.
8. Cool. Cool in the pan for 20 minutes, then move to a wire rack to cool before slicing.
How to Serve Sour Cream Banana Bread
Slice thick pieces and serve warm with butter, or spread with cream cheese for a tangy contrast. Round out a baking spread with super moist banana bread and banana pecan bread. For something different, add blueberry crumble muffins or fudgy chocolate banana bread.
How to Store and Reheat Sour Cream Banana Bread
Store the cooled loaf covered at room temperature for up to 2 days, then refrigerate for up to 1 week since the sour cream makes it more perishable. Wrap slices in foil or plastic wrap and freeze for up to 3 months. Thaw at room temperature before serving.
Tips and Variations for Sour Cream Banana Bread
Bring items to room temperature. Cold eggs and sour cream can curdle the batter and make a dense loaf.
Do not overmix. Stir only until the flour disappears for a tender crumb.
Check the oats. Quick oats work too, but blend them for 20 to 30 seconds so they turn to powder.
Skip the nuts. The loaf is just as good plain, or swap in chocolate chips.
Use the right pan size. A 9×5 inch pan keeps the loaf from baking dense.
Tent early. Cover loosely with foil after 40 minutes if the top darkens too quickly.
Freeze the bananas. Store overripe bananas in the freezer, then thaw and drain before measuring.
Chill leftovers. Baked goods made with dairy keep well in the refrigerator. For general advice on storing prepared foods, see this Purdue Extension guide.
Frequently Asked Questions About Sour Cream Banana Bread
What makes sour cream banana bread so moist?
The fat and acid in sour cream tenderize the crumb and hold in moisture for days.
Can I make sour cream banana bread without oats?
Yes. Replace the oat flour with 1/2 cup all purpose flour, so the total is 1 1/2 cups.
Can I use Greek yogurt in sour cream banana bread?
Yes. Full fat plain Greek yogurt works as a one to one replacement.
How ripe should the bananas be?
Use bananas with mostly brown skin for the ideal sweetness and flavor.
Can I bake this in muffin tins?
Yes. Fill lined cups two thirds full and bake for 22 to 25 minutes.
Sour Cream Banana Bread
Equipment
- 9×5 inch loaf pan
- Hand or stand mixer
- Blender or food processor
- Wire rack
Ingredients
Main Ingredients
- ½ cup unsalted butter softened
- ½ cup brown sugar packed
- ½ cup granulated sugar
- 2 large eggs room temperature
- 2 tsp vanilla extract
- 1 cup mashed ripe banana about 2 1/2 medium
- ½ cup sour cream
- 1 cup all purpose flour spooned and leveled
- ½ cup old fashioned oats blended into powder
- ½ tsp baking soda
- 1 tsp baking powder
- ½ tsp kosher salt
- ¼ tsp ground cinnamon
- ⅛ tsp ground nutmeg
- ⅛ tsp ground cloves
- ½ cup chopped pecans or walnuts toasted, optional
Instructions
Cooking
- Preheat. Set the oven to 350 degrees F and grease a 9×5 inch pan. Toast nuts. Toast optional nuts for 5 to 7 minutes and cool.
- Cream. Beat butter with both sugars for 2 minutes until fluffy. Add wet ingredients. Beat in eggs and vanilla, then fold in the banana.
- Whisk dry. Combine both flours, baking soda, baking powder, salt, and spices.
- Combine. Stir the dry mixture into the batter, then fold in the sour cream and nuts.
- Bake 55 to 60 minutes. Bake until a toothpick comes out clean or with moist crumbs.
- Cool 20 minutes. Cool in the pan, then move to a rack.
