Moist One-Bowl Banana Loaf Cake

This banana loaf cake is everything you want in a quick bread: a tender crumb, loads of real banana flavor, and a crackled golden top. And it all happens in one bowl with no mixer needed.

Ripe bananas and a scoop of yogurt keep it moist for days, making it the kind of cake you can slice for breakfast, tuck into lunchboxes, or set out as an afternoon snack.

Why This Loaf Cake Stays in the Rotation

I’ve made more loaf cakes than I can count, and this one-bowl version is the one I reach for when I want something reliable with almost no cleanup. The oil and yogurt give it a soft, plush texture that doesn’t dry out the next day.

The banana flavor is front and center, not masked by heavy spices, so it tastes like real fruit. It’s simple, honest, and just sweet enough.

Ingredients

• 3 large very ripe bananas: the spottier the peel, the sweeter the cake
• 1/2 cup plain yogurt: full-fat or low-fat; sour cream works too
• 1/3 cup neutral oil: canola, vegetable, or melted coconut oil
• 2 large eggs: at room temperature
• 3/4 cup granulated sugar: or a little less if your bananas are very sweet
• 1 teaspoon vanilla extract
• 1 1/2 cups all-purpose flour
• 1 teaspoon baking soda
• 1/2 teaspoon salt

Variations / Substitutions

• Chocolate chips: fold in 1/2 cup of mini or regular chocolate chips with the dry ingredients
• Walnuts or pecans: add 1/2 cup of toasted, chopped nuts for a crunchy contrast
• Brown sugar: swap half the granulated sugar for packed light brown sugar for a deeper caramel note
• Dairy-free: use a thick plant-based yogurt and make sure your eggs are large ones for structure
• Gluten-free: replace the flour with a 1:1 gluten-free baking blend and stir gently to avoid a gummy texture

For a spiced version, try my Banana Chocolate Chip Muffins.

How To Make Banana Loaf Cake

Step 1: Mash and Mix the Wet Ingredients

Preheat your oven to 350°F (175°C) and grease a 9×5-inch loaf pan or line it with parchment paper. In a large bowl, mash the 3 ripe bananas until mostly smooth (a few small lumps are fine). Whisk in the 1/2 cup yogurt, 1/3 cup oil, 2 eggs, 3/4 cup sugar, and 1 teaspoon vanilla until the mixture looks uniform and a little bubbly.

The batter will be loose and thin at this stage. That’s exactly what you want because it means the dry ingredients will blend in without much stirring.

Step 2: Fold in the Dry Ingredients

Sprinkle the 1 1/2 cups flour, 1 teaspoon baking soda, and 1/2 teaspoon salt right over the wet mixture. Take a rubber spatula and gently fold everything together, scraping the bottom and sides of the bowl, just until no dry streaks remain.

Stop as soon as the flour disappears. If you keep mixing, the cake can turn out tough, so a few small lumps are perfectly fine. The finished batter will be thick and slightly glossy.

Step 3: Bake the Loaf

Scrape the batter into your prepared pan and smooth the top with the spatula. Slide the pan into the oven and bake for 50 to 60 minutes. The top should rise into a tall, golden dome with a crack running down the center. A toothpick poked into the middle should come out with only a few moist crumbs, not wet batter.

If the top is browning too deeply before the center is done, tent a piece of foil loosely over the pan after about 40 minutes. That lets the inside finish baking without burning the crust.

Step 4: Cool and Slice

Let the loaf cool in the pan for 10 minutes. Then lift it out by the parchment or gently tip it onto a wire rack to cool completely. Use a serrated knife to cut thick slices and serve them while they are still faintly warm.

The crumb will be soft, moist, and pale gold, with a delicate, thin crust that’s just firm enough to hold its shape.

A Few Notes for the Best Loaf

• Use bananas that are truly overripe, with dark brown spots all over. They mash easier and give a deeper, natural sweetness.
• Measure your flour by spooning it into the cup and leveling it off. Scooping directly from the bag can pack in too much and make the cake dense.
• Don’t skip the yogurt. It’s the ingredient that keeps the loaf moist for days without feeling oily.
• Check your loaf 5 minutes before the earliest bake time. Ovens vary, and overbaking will dry out the crumb.
• For a slightly higher domed top, let the batter rest in the pan on the counter for 10 minutes before baking. The brief rest helps the gluten relax and encourages a better rise.

Bake times will shift if you use a different loaf pan.

Keeping the Loaf Fresh

Store the completely cooled loaf tightly wrapped at room temperature for up to 3 days, or refrigerate it for up to a week. You can freeze the whole loaf or individual slices wrapped in plastic then foil for up to 3 months. Thaw slices on the counter or give them a quick toast in the oven.

Frequently Asked Questions

Can I use butter instead of oil?

Yes, melted unsalted butter works well. Let it cool slightly before mixing, and note the crumb will be a little denser.

Can I make this into muffins?

Absolutely. Divide the batter into a 12-cup muffin tin and bake at 350°F for 18 to 22 minutes, until a toothpick comes out clean.

My loaf sank in the middle. What went wrong?

The most common cause is underbaking. Make sure the toothpick comes out with only moist crumbs and no wet batter. Opening the oven door too early can also cause the center to fall.

Can I reduce the sugar?

You can cut the sugar to 1/2 cup without changing the texture too much, but the cake won’t be quite as tender and may brown less.

Banana Loaf Cake Recipe

Print Recipe Pin Recipe

Prep Time 10 minutes mins

Cook Time 55 minutes mins

Total Time 1 hour hr 5 minutes mins

Servings: 8 servings

Calories: 230

Ingredients Method Notes

Ingredients

  

• 3 large very ripe bananas
• 1/2 cup plain yogurt
• 1/3 cup neutral oil
• 2 large eggs
• 3/4 cup granulated sugar
• 1 teaspoon vanilla extract
• 1 1/2 cups all-purpose flour
• 1 teaspoon baking soda
• 1/2 teaspoon salt

Method

 

1. Preheat oven to 350°F (175°C). Grease a 9×5-inch loaf pan. In a large bowl, mash bananas, then whisk in yogurt, oil, eggs, sugar, and vanilla until uniform.
2. Sprinkle flour, baking soda, and salt over the wet mixture. Fold gently with a spatula until no dry streaks remain; do not overmix.
3. Pour batter into the pan and smooth the top. Bake 50 to 60 minutes, until a toothpick inserted in the center has only moist crumbs and the top is deeply golden.
4. Cool in the pan 10 minutes, then transfer to a rack to cool completely. Slice thick and serve slightly warm or at room temperature.

Notes

If your bananas are not very sweet, an extra tablespoon of sugar can balance the flavor. The loaf firms up as it cools, so cutting it while still a little warm gives the cleanest slices. For the best texture, let it rest a few hours before storing.