Banana Bread Recipe With Oil and Butter: Ultra Moist Crumb in One Bowl

This recipe combines the best of both worlds—oil for ultra-moist texture and butter for rich flavor. One bowl is all you need for perfect results every time.

I developed this method after testing countless variations to achieve the ideal balance. The oil keeps the crumb tender, while butter adds depth that makes it irresistible.

Ingredients for Banana Bread Recipe with Oil and Butter

Pantry staples plus a few fresh items create this ultra-moist, richly flavored classic.

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The bananas are everything here—use ones with plenty of brown spots (the riper, the better). King Arthur Flour is my go-to for all-purpose, but any reliable brand works. The butter adds richness, so don’t skip it; Land O’Lakes or a high-quality store brand is fine. Sour cream might seem unusual, but it’s the secret to that tender crumb (full-fat is key).

No sour cream? Greek yogurt or buttermilk at the same amount works perfectly. Out of walnuts? Pecans or chocolate chips add great texture. If you only have salted butter, reduce the added salt by half. The oil keeps it moist, but you can use all butter if you prefer—just replace the oil with melted butter at the same quantity.

Store leftovers wrapped tightly at room temperature for 2 days or refrigerated for 5 days. Freezes beautifully for up to 3 months—slice before freezing for easy portions. Best served slightly warm.

Step-by-Step Instructions for Banana Bread with Oil and Butter

This one-bowl method delivers ultra-moist banana bread with minimal effort and maximum flavor.

Step 1: Prepare Wet Ingredients and Bananas

In a large mixing bowl, mash the 3 whole ripe bananas until smooth with only a few small lumps remaining. The bananas should be very ripe with plenty of brown spots—this ensures maximum sweetness and moisture in the final bread.

Add the 0.75 cup granulated sugar, 0.5 cup vegetable oil, 0.25 cup melted unsalted butter, 2 whole large eggs, 0.5 cup sour cream, and 1 tsp vanilla extract. Whisk vigorously for 1-2 minutes until the mixture is completely homogenous and slightly pale in color. This emulsification step is crucial for a tender crumb.

Step 2: Incorporate Dry Ingredients

Sift the 1.5 cups all-purpose flour, 1 tsp baking soda, 0.5 tsp salt, and 1 tsp ground cinnamon directly into the wet mixture. I recommend sifting to prevent flour lumps and ensure even distribution of the leavening agents.

Using a silicone spatula, fold the dry ingredients into the wet mixture until just combined. You should see a few streaks of flour remaining—overmixing at this stage develops gluten, which can make the bread dense. The batter will be thick but pourable.

Step 3: Fold in Walnuts and Transfer to Pan

Gently fold in the 0.5 cup chopped walnuts until evenly distributed. If you’re not using walnuts, skip this step—the bread will still be wonderfully moist without them.

Pour the batter into a greased 9×5-inch loaf pan, spreading it evenly with the spatula. Tap the pan firmly on the counter 2-3 times to remove any large air bubbles and ensure an even rise.

Step 4: Bake to Golden Perfection

Preheat your oven to 350°F and position the rack in the center. Bake for 55-65 minutes, or until a toothpick inserted into the center comes out clean or with only a few moist crumbs attached.

The bread is done when the top is deep golden brown and the center springs back when lightly pressed. If the top begins to brown too quickly, tent the pan loosely with aluminum foil for the remaining bake time.

Step 5: Cool and Serve

Remove the pan from the oven and let the bread cool in the pan for 10 minutes. This allows it to set slightly before removing. Then, transfer the loaf to a wire rack and let it cool completely for at least 1 hour before slicing.

I know the wait is tough, but cooling prevents crumbling and allows the flavors to fully develop. Slice with a serrated knife for clean cuts, and serve at room temperature. The combination of oil and butter ensures this stays moist for days.

Health Benefits of These Flavors

Rich in Energy

This bread packs natural energy from ripe bananas, which are loaded with potassium and vitamin B6. The 3 bananas in each loaf provide steady energy without the crash you get from processed snacks. I love how this keeps me fueled during long coastal rides. 💪

Healthy Fats Balance

The combination of vegetable oil and unsalted butter provides a balance of saturated and unsaturated fats. These fats are essential for nutrient absorption, especially for fat-soluble vitamins A, D, E, and K in this recipe.

Protein Boost

With 2 large eggs and 0.5 cup sour cream, each slice delivers a surprising protein punch. Eggs provide all nine essential amino acids, while sour cream adds casein, a slow-digesting protein that keeps you feeling full longer.

Fiber Benefits

The 1.5 cups all-purpose flour and bananas contribute dietary fiber, which supports digestive health. While not as high as whole grain versions, this bread still offers a moderate fiber boost to your diet. I often pair it with fresh berries for extra fiber. 🥗

Mood Enhancement

Bananas contain tryptophan, an amino acid that converts to serotonin in the body. The cinnamon adds antioxidants that may help regulate blood sugar. Together, they make this bread a comforting treat that might just brighten your day.

Frequently Asked Questions