Banana Sour Cream Walnut Loaf Recipe - Kosher

Moist, rich, and packed with sweet banana flavor, this Kosher Banana Sour Cream Walnut Loaf is the kind of comforting quick bread that fills your kitchen with an irresistible aroma. Sour cream creates an incredibly tender crumb while toasted walnuts add a satisfying crunch in every bite. Whether you're enjoying it with breakfast, serving it for brunch, or sharing it over coffee with friends, this loaf is simple enough for beginners yet delicious enough for special occasions.

Recipe Information

Cuisine: American
Course: Breakfast, Brunch, Snack, Dessert
Servings: 10 slices
Yield: 1 (9x5-inch) loaf
Prep Time: 15 minutes
Cook Time: 55–65 minutes
Cooling Time: 20 minutes
Total Time: About 1 hour 40 minutes
Difficulty: Easy

Cooking Vessels & Equipment

9x5-inch loaf pan
Large mixing bowl
Medium mixing bowl
Measuring cups
Measuring spoons
Rubber spatula
Whisk
Fork or potato masher
Cooling rack
Toothpick for testing doneness

Ingredients

3 ripe bananas, mashed
½ cup unsalted butter, softened
¾ cup granulated sugar
¼ cup light brown sugar
2 large eggs
½ cup sour cream
1 teaspoon vanilla extract
2 cups all-purpose flour
1 teaspoon baking soda
½ teaspoon baking powder
½ teaspoon kosher salt
1 teaspoon ground cinnamon (optional)
1 cup chopped walnuts

Optional Topping

2 tablespoons chopped walnuts
1 teaspoon coarse sugar

Instructions

1. Prepare the Oven

Preheat the oven to 350°F (175°C).

Grease a 9x5-inch loaf pan or line it with parchment paper.

2. Mash the Bananas

Mash the bananas until mostly smooth. A few small lumps are perfectly fine.

3. Cream the Butter and Sugar

Beat together the softened butter, granulated sugar, and brown sugar until light and fluffy.

4. Add Wet Ingredients

Beat in the eggs one at a time.

Mix in:

Sour cream
Vanilla
Mashed bananas

Stir until well combined.

5. Combine Dry Ingredients

In another bowl whisk together:

Flour
Baking soda
Baking powder
Salt
Cinnamon (if using)

6. Make the Batter

Gradually fold the dry ingredients into the wet ingredients.

Mix only until no dry flour remains.

Fold in the chopped walnuts.

7. Bake

Spread the batter evenly into the prepared loaf pan.

Sprinkle additional walnuts and coarse sugar on top if desired.

Bake for 55–65 minutes, or until a toothpick inserted into the center comes out clean.

If the loaf browns too quickly, loosely tent it with foil during the final 15–20 minutes.

8. Cool

Allow the loaf to cool in the pan for 15–20 minutes.

Transfer to a cooling rack before slicing.

Nutritional Information (Approximate Per Slice)

Calories: 285
Protein: 5g
Carbohydrates: 35g
Fat: 14g
Saturated Fat: 6g
Fiber: 2g
Sugar: 18g
Sodium: 220mg

Dietary Adaptations

Dairy-Free

Replace butter with non-dairy margarine.
Substitute dairy-free sour cream.

Nut-Free

Simply omit the walnuts.

Whole Wheat

Replace half of the flour with whole wheat flour.

Lower Sugar

Reduce sugar by ¼ cup for a less sweet loaf.

Chocolate Version

Fold in ½ cup kosher chocolate chips.

Tips & Troubleshooting

Use bananas with plenty of brown spots for maximum sweetness.
Don't overmix the batter.
Measure flour by spooning it into the measuring cup.
Let the loaf cool before slicing.
Toast the walnuts beforehand for deeper flavor.

Kosher Considerations

Use certified kosher sour cream.
Ensure vanilla extract is kosher certified.
Use certified kosher baking powder.
If adding chocolate chips, choose kosher-certified dairy or pareve chips depending on your meal.
Since this recipe contains dairy, serve it with dairy or pareve meals rather than meat meals.

Shabbat Adaptations

Bake the loaf before Shabbat.
Slice before Shabbat if preferred for easy serving.
Store tightly wrapped to maintain freshness.
Enjoy at room temperature alongside tea or coffee.

Common Mistakes to Avoid

Using underripe bananas.
Overmixing the batter.
Opening the oven too early.
Underbaking the center.
Cutting the loaf while it's still hot.

Variations

Cinnamon Swirl Banana Loaf
Banana Pecan Loaf
Banana Almond Loaf
Banana Streusel Loaf
Blueberry Banana Walnut Loaf
Banana Coconut Loaf
Maple Walnut Banana Bread
Honey Banana Loaf
Banana Date Walnut Bread
Banana Chocolate Chip Walnut Bread

Serving Suggestions

Serve warm or at room temperature with:

Butter
Cream cheese
Honey
Fruit preserves
Fresh berries
Greek yogurt
Coffee
Tea
Hot cocoa

What to Serve With This Recipe

Fresh fruit salad
Scrambled eggs
Cottage cheese
Yogurt parfait
Vegetable omelet
Smoothies
Hot coffee
Herbal tea

Why You'll Love This Recipe

Wonderfully moist texture
Rich banana flavor
Crunchy toasted walnuts
Simple pantry ingredients
Perfect for breakfast or dessert
Freezes beautifully
Great way to use overripe bananas
Family friendly
Easy enough for beginner bakers

Expert Tips for Success

The darker the bananas, the sweeter the loaf.
Room-temperature ingredients blend more smoothly.
Toast walnuts for extra flavor.
Check doneness in several places since banana bread bakes unevenly.
Cool completely before wrapping for storage.
For even slices, use a serrated bread knife.

Storage Instructions

Store tightly wrapped at room temperature for up to 3 days.

Refrigerate for up to 1 week in an airtight container.

Freezing Instructions

Wrap the cooled loaf tightly in plastic wrap followed by aluminum foil.

Freeze for up to 3 months.

Individual slices can also be frozen for quick breakfasts.

Thaw overnight in the refrigerator or at room temperature.

Reheating Instructions

Microwave individual slices for 15–20 seconds.
Warm in a 300°F oven for 8–10 minutes.
Toast slices lightly for crisp edges and a warm center.

Meal Prep Tips

Mash and freeze ripe bananas until ready to bake.
Toast walnuts in advance and store in an airtight container.
Bake two loaves at once—one for now and one for the freezer.
Slice before freezing for convenient grab-and-go portions.

Frequently Asked Questions

Can I use frozen bananas?

Yes. Thaw them completely and drain any excess liquid before using.

Can I leave out the walnuts?

Absolutely. The loaf is just as delicious without nuts.

Why does sour cream make banana bread better?

Sour cream adds moisture, richness, and a tender crumb while helping the loaf stay fresh longer.

Can I make muffins instead?

Yes. Divide the batter into muffin tins and bake at 350°F for 18–24 minutes.

How do I know when it's fully baked?

Insert a toothpick into the center. It should come out with only a few moist crumbs and no wet batter.

Can I make this ahead of time?

Yes. In fact, many people find the flavor improves after resting overnight, making it an excellent make-ahead loaf for brunches, holidays, or weekday breakfasts.