If you’re searching for banana bars that are ultra-moist, warmly spiced, and simple enough for any day of the week, this recipe is exactly what you need. Made with ripe bananas, rich sour cream, and a handful of walnuts, these soft-baked bars come together easily and stay tender for days—perfect for family desserts, lunchbox treats, or casual gatherings.
Why You’ll Love These Banana Bars
These banana bars strike the perfect balance between cake-like softness and bar-cookie ease. Sour cream adds a subtle tang and unbeatable moisture, while cinnamon and nutmeg bring cozy flavor without overpowering the bananas. Because the batter bakes in a single pan, there’s no fussing with layers or frosting unless you want to. They’re forgiving, freezer-friendly, and a great way to rescue those spotted bananas on your counter.
Ingredients You’ll Need
- 1 ¾ cups sugar
- 1 cup sour cream (full-fat preferred)
- ½ cup butter, softened
- 2 eggs
- 2 cups mashed ripe bananas (about 4 large)
- 2 teaspoons vanilla extract
- 2 ¼ cups all-purpose flour
- 1 teaspoon baking soda
- ¾ teaspoon salt
- ½ teaspoon ground cinnamon
- ¼ teaspoon ground nutmeg
- ½ cup walnuts, chopped
How to Make Banana Bars (Step-by-Step)
Step 1: Prep the Pan
Preheat your oven to 350°F (175°C). Grease a 9×13-inch baking pan or line it with parchment paper for easy removal.
Step 2: Cream the Base
In a large bowl, beat the softened butter and sugar until light and fluffy. Mix in the sour cream until smooth and creamy.
Step 3: Add Eggs and Bananas
Beat in the eggs one at a time, then stir in the mashed bananas and vanilla extract. The mixture should look thick but pourable.
Step 4: Combine Dry Ingredients
In a separate bowl, whisk together the flour, baking soda, salt, cinnamon, and nutmeg.
Step 5: Bring It Together
Gradually fold the dry ingredients into the wet mixture, mixing just until combined. Avoid overmixing to keep the bars soft.
Step 6: Add Walnuts
Gently fold in the chopped walnuts, spreading them evenly through the batter.
Step 7: Bake
Pour the batter into the prepared pan and smooth the top. Bake for 25–30 minutes, or until a toothpick inserted in the center comes out clean.
Step 8: Cool and Slice
Allow the banana bars to cool completely in the pan before slicing into squares.
Tips & Variations
- Nut-Free Option: Skip the walnuts or replace them with chocolate chips.
- Extra Spice: Add a pinch of cloves or allspice for deeper warmth.
- Lighter Sweetness: Reduce sugar by ¼ cup if your bananas are very ripe.
- Dairy Swap: Plain Greek yogurt works well in place of sour cream.
Serving Ideas & Storage
Serve these banana bars plain, dusted lightly with powdered sugar, or topped with a simple vanilla glaze. They’re excellent with afternoon tea or packed as a make-ahead dessert. Store bars in an airtight container at room temperature for up to 3 days or refrigerate for 5 days. Freeze individually wrapped bars for up to 2 months.
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Easy Banana Bars with Sour Cream and Walnuts
- Total Time: 45 minutes
- Yield: 24 bars 1x
- Diet: Vegetarian
Description
These moist banana bars are soft, cake-like, and packed with ripe banana flavor. Sour cream keeps them extra tender, cinnamon and nutmeg add cozy warmth, and chopped walnuts give the perfect crunch—an easy bake that’s great for snacks or dessert.
Ingredients
1 3/4 cups sugar
1 cup sour cream (thick, full-fat preferred)
1/2 cup butter, softened (room temperature)
2 large eggs
2 cups mashed bananas (about 4 large very ripe bananas)
2 tsp vanilla extract
2 1/4 cups all-purpose flour
1 tsp baking soda
3/4 tsp salt
1/2 tsp ground cinnamon
1/4 tsp ground nutmeg
1/2 cup walnuts, chopped (about 1/4-inch pieces)
Instructions
1. Preheat oven to 350°F (175°C). Grease a 9×13-inch pan or line with parchment.
2. In a large bowl, beat butter and sugar until creamy (about 1–2 minutes).
3. Mix in sour cream until smooth.
4. Add eggs one at a time, mixing after each. Stir in mashed bananas and vanilla.
5. In a separate bowl, whisk flour, baking soda, salt, cinnamon, and nutmeg.
6. Add dry ingredients to wet ingredients and mix just until combined (don’t overmix).
7. Fold in chopped walnuts.
8. Spread batter evenly into prepared pan.
9. Bake 25–30 minutes, or until a toothpick inserted in the center comes out clean.
10. Cool completely before slicing into bars.
Notes
Bananas: The riper and spottier, the sweeter and more flavorful your bars will be.
Sour cream swap: Use plain Greek yogurt (full-fat) for a similar texture.
Nut-free option: Skip walnuts or replace with 1/2 cup chocolate chips.
Storage: Keep airtight at room temp 3 days or refrigerate up to 5 days.
Freezing: Wrap bars individually and freeze up to 2 months. Thaw at room temp.
- Prep Time: 15 minutes
- Cook Time: 30 minutes
- Category: Dessert
- Method: Baking
- Cuisine: American
Nutrition
- Serving Size: 1 bar
- Calories: 290
- Sugar: 28g
- Sodium: 210mg
- Fat: 11g
- Saturated Fat: 5g
- Unsaturated Fat: 5g
- Trans Fat: 0g
- Carbohydrates: 45g
- Fiber: 2g
- Protein: 4g
- Cholesterol: 35mg
Nutrition Facts (Per Serving)
| Calories | Protein | Carbs | Fat | Fiber | Sodium |
|---|---|---|---|---|---|
| ~290 | 4g | 45g | 11g | 2g | 210mg |
Final Thoughts
These banana bars are proof that simple ingredients can create something truly comforting. Moist, flavorful, and endlessly adaptable, they’re the kind of recipe you’ll come back to every time bananas go brown. Bake once, enjoy all week.