Desserts
This banana cake made with oil delivers a moist, tender crumb and that coveted golden crunch top—all from overripe bananas and simple pantry staples. The oil-based batter creates a rich texture without needing butter, while the secret to the crispy crust lies in a quick egg wash and high-heat baking. I perfected this recipe after years of testing, ensuring it’s foolproof for home bakers.
The recipe starts with mashed bananas—no peeling required—mixed with oil, flour, and baking powder for a tender crumb. A light folding technique incorporates air for extra lift, and the batter rests briefly to develop flavor before baking. The result? A cake that’s perfectly moist inside with a caramelized, crackly top that begs for a second slice.
Baking at 350°F for 30-35 minutes ensures even cooking, while the final egg wash guarantees that signature crispy finish. This cake keeps well for days, making it ideal for meal prep or gifting. Whether you’re using overripe bananas or fresh ones, the oil-based method guarantees a rich, buttery taste without the fuss.
Serve warm with a dollop of whipped cream or a scoop of vanilla ice cream for the ultimate dessert experience. The recipe scales easily, so double it for gatherings—every bite will have your guests asking for the recipe. Let’s get baking!
Ingredients for banana cake made with oil
Simple pantry staples and overripe bananas create this rich, moist cake with a signature golden crunch top.
| Ingredient | Amount | Notes |
|---|---|---|
| Overripe Bananas 🍌 | 2 cups | Mashed, no peeling required |
| Vegetable Oil 🫒 | 1 cup | Light or canola preferred |
| All-Purpose Flour 🌾 | 2 cups | Sifted for best texture |
| Granulated Sugar 🍚 | 1 ½ cups | White or light brown |
| Baking Powder 🧂 | 2 tsp | Not baking soda |
| Salt 🧂 | ½ tsp | Fine sea salt |
| Large Eggs 🥚 | 2 whole | Room temperature |
| Vanilla Extract 🌸 | 1 tbsp | Pure vanilla preferred |
| Walnuts 🥜 | ½ cup | Chopped, optional topping |
| Whipped Cream 🍦 | 1 cup | For serving, optional |
| Powdered Sugar 🍚 | 2 tbsp | For egg wash |
The bananas are the heart of this recipe—overripe is ideal for natural sweetness and moisture, but fresh works too. Grab a bunch from the produce section (they’re often discounted when spotted). For the oil, light or canola keeps the cake tender without butter’s richness. The flour should be sifted to avoid lumps—King Arthur or Gold Medal brands work perfectly. If you’re using walnuts, toast them first for extra flavor, but they’re totally optional if you prefer a simpler presentation.
No vegetable oil? Melted coconut oil or neutral-tasting olive oil works in a pinch, though it may add a slight flavor. Short on baking powder? Use 1.5 tsp baking powder plus 1/4 tsp baking soda, but don’t skip both. The vanilla extract can be swapped for 1 tsp vanilla sugar if you’re out, but pure extract is worth the splurge. For the egg wash, mix the powdered sugar with 1 tbsp milk to create a glossy, crispy crust—don’t skip this step for that signature finish.
This cake keeps beautifully for 4-5 days in an airtight container at room temperature, or 1 week in the fridge. For longer storage, wrap tightly and freeze for up to 3 months—thaw overnight at room temperature. The walnuts, if used, should be stored in a sealed container to prevent drying out. Leftovers? Reheat slices in a 200°F oven for 5 minutes to restore freshness.
Why You'll Love This Recipe
- No-Fuss Mix-In: I swear by this recipe because it’s the kind of cake that forgives you. Mash those overripe bananas—no peeling required—and fold in the oil and dry ingredients. Five minutes of stirring, one bowl, done. Honestly, I’ve made it with cold bananas straight from the fridge and still ended up with moist crumb.
- Sweet-Spiced Magic: That caramelized banana flavor? It’s like dessert got a warm hug. The oil keeps it tender while the sugar and baking powder give it just enough lift—no dense, dry cake here. (Yes, even on a Tuesday night, this tastes like you slaved over it.)
- Crowd-Pleaser Any Day: Pack it for lunch, slice it for a picnic, or serve it at a potluck—this cake disappears fast. The oil-based batter means it stays fresh longer than butter cakes, and the overripe bananas stretch the recipe without extra cost. Between us, it’s my go-to for birthdays and lazy Sundays.
- Pantry Goldmine: You’re already using what you have: flour, sugar, and oil that’s probably been in your cupboard forever. Overripe bananas? Free dessert from your fruit bowl. No fancy ingredients, no last-minute store runs. I’ll be real: this is the kind of recipe that makes me feel like a baking genius without breaking the bank.
Step-by-step instructions for banana cake made with oil
Here's the method for a moist, flavorful banana cake with that signature golden crunch top.
Prepare the Overripe Bananas and Wet Ingredients
Mash the 2 cups of overripe bananas in a medium bowl until completely smooth—no lumps should remain. The riper the bananas, the sweeter and more flavorful your cake will be. In a separate large bowl, combine the 1 cup of vegetable oil, 1.5 cups of granulated sugar, and the 2 whole large eggs. Mix on medium speed with an electric mixer for about 2 minutes until the mixture is light and slightly thickened.
This creaming process incorporates air, which helps create a tender crumb. Add the 1 tablespoon of vanilla extract and mix for another 30 seconds. The mixture should be smooth and well combined. If you notice any banana residue on the sides of the bowl, use a rubber spatula to scrape it down to ensure everything is properly incorporated.
Combine Dry Ingredients and Fold in Bananas
In a separate bowl, sift together the 2 cups of all-purpose flour, 2 teaspoons of baking powder, and 0.5 teaspoon of salt. This sifting step ensures your cake will have an even texture without any lumps. Gradually add the dry ingredients to the wet mixture, mixing on low speed just until combined. You should still see some flour streaks—overmixing develops gluten, which can make the cake tough.
Next, fold in the mashed bananas using a rubber spatula. Be gentle to avoid deflating the batter. The batter will be thick but should still be pourable. If it looks too thick, you can add 1-2 tablespoons of milk or water to loosen it slightly. This step ensures the bananas are evenly distributed throughout the cake, giving it that signature banana flavor in every bite.
Chop Walnuts and Prepare the Cake Pan
Chop the 0.5 cup of walnuts into small pieces if they aren't already pre-chopped. These will add a delightful crunch to the cake. Lightly grease an 8-inch round or square cake pan and line the bottom with parchment paper. This prevents the cake from sticking and makes for easy removal. Preheat your oven to 350°F while you prepare the final touches.
Pour the batter into the prepared pan and sprinkle the chopped walnuts evenly over the top. The walnuts will not only add texture but also enhance the visual appeal of your cake. For that signature golden crunch top, mix the 2 tablespoons of powdered sugar with 1 tablespoon of water to create an egg wash. Brush this mixture evenly over the top of the cake, focusing on the edges and center.
Bake to Golden Perfection
Bake the cake in the preheated oven for 35-40 minutes, or until a toothpick inserted into the center comes out clean. The cake should be golden brown on top with a slightly domed center. Avoid opening the oven door during the baking process—this can cause the cake to sink in the middle. If you notice the edges browning too quickly, loosely cover the cake with aluminum foil.
Once the cake is done, remove it from the oven and let it cool in the pan for 10 minutes. This allows the cake to set slightly before transferring it to a wire rack to cool completely. The cake will be moist and tender, with a perfect balance of sweetness from the bananas and a delightful crunch from the walnuts. Serve it warm or at room temperature with a dollop of the 1 cup of whipped cream for an extra indulgent treat.
Pro Tips For Making Banana Cake Made With Oil
- Mash Bananas Thoroughly: Skip the blender—use a sturdy fork and really work those overripe bananas until smooth. Lumps turn into a dense, moist cake, not a sad, chewy one. I learned this the hard way when my first batch had banana chunks that fell apart like wet cardboard.
- Preheat Pan and Oven: Hot pan, hot oven—this isn’t just a suggestion. Grease your pan with oil, then pop it in the oven for 5 minutes while it preheats. The cake will rise faster and won’t stick, even if you’re impatient like me. (Yes, I’ve tried skipping this and regretted it.)
- Measure Oil Precisely: That “about ½ cup” in the recipe? Use a proper measuring cup, not a spoon. Too little oil and your cake turns dry; too much and it’s greasy. I used to eyeball it—now I measure, and the texture is consistently perfect.
- Check Doneness Early: Banana cakes sink in the middle faster than you think. Start checking with a toothpick at 25 minutes (adjust based on your oven). If it’s wet but crumbly, tent with foil and bake 5 more minutes. Overbaking turns moist cake into a sad, dry brick.
Perfect pairings for this recipe
Creamy Toppings
Whipped cream is my go-to topping for this banana cake—it balances the rich oil-based batter beautifully. Use 1 cup of heavy whipping cream chilled for at least 2 hours, then whip with 1 tablespoon powdered sugar until soft peaks form. For extra flavor, fold in ½ teaspoon vanilla extract or a pinch of cinnamon. 🥛
For a lighter option, try Greek yogurt mixed with honey—I use ¾ cup plain Greek yogurt with 1 tablespoon honey and a sprinkle of toasted coconut flakes. The tanginess cuts through the sweetness while adding protein. Store-bought vanilla ice cream also works, but homemade vanilla bean ice cream elevates the experience.
Fruit Complements
Fresh berries add a bright contrast to the cake’s richness. I recommend 1 cup mixed berries (strawberries, blueberries, or raspberries) tossed with 1 teaspoon lemon juice to prevent browning. The acidity enhances the banana flavor while adding a refreshing crunch. 🍓
For a tropical twist, slice ½ cup pineapple and macerate with 1 teaspoon lime juice and ½ teaspoon brown sugar for 15 minutes. The pineapple’s natural sweetness and tang pair perfectly with the cake’s caramelized top. Serve the cake warm for the best flavor interplay.
Warm Spiced Syrups
A drizzle of warm spiced syrup takes this cake to the next level. Simmer ½ cup orange juice with 2 tablespoons brown sugar, ½ teaspoon cinnamon, and ¼ teaspoon nutmeg for 5 minutes, then strain. Drizzle over slices just before serving for a fragrant, citrusy finish. 🍊
For a caramel option, heat ½ cup heavy cream with ¼ cup granulated sugar until the sugar dissolves, then simmer until thickened (about 8 minutes). Stir in 1 tablespoon butter and pour over the cake. The buttery caramel complements the oil-based cake beautifully.
Crunchy Additions
Toasted nuts or seeds add texture contrast. I love ¼ cup chopped pecans or almonds, toasted in a dry pan for 3-4 minutes until fragrant. Sprinkle over the cake or whipped cream for a satisfying crunch. For a nut-free option, use ¼ cup granola—look for low-sugar varieties to avoid overwhelming the cake’s natural sweetness.
Crushed wafer cookies (like vanilla or chocolate sandwich cookies) also work well. Pulse ½ cup cookies in a food processor until finely crushed, then sprinkle over the cake or mix into the whipped cream. The buttery cookie crumbs add a nostalgic touch that pairs perfectly with banana cake. ✨
Nutrition facts
Frequently asked questions
Can I substitute butter for the vegetable oil in this recipe?
The recipe is specifically designed with oil for a tender, moist texture without butter's richness. However, you can use ¾ cup melted butter (not oil) if needed—just reduce the sugar slightly (1.25 cups) since butter adds sweetness. The cake will have a slightly different flavor profile but still work well.
Why does my banana cake turn out dense instead of moist?
Overmixing the batter develops gluten, making the cake tough. Mix dry ingredients just until combined, and fold in bananas gently. Another common issue is underbaking—always check with a toothpick (35-40 minutes at 350°F). For extra moisture, add 1-2 tablespoons milk if the batter seems too thick.
How do I make this banana cake gluten-free?
Replace the all-purpose flour with a 1:1 gluten-free baking flour blend (like Bob's Red Mill) and add ½ teaspoon xanthan gum if the blend doesn't contain it. For best results, use 2.25 cups of the blend and reduce baking powder to 1.5 teaspoons. The texture will be slightly different but still delicious.
Can I bake this cake in a different-sized pan?
Yes! For an 8-inch round pan, use the recipe as written. For a 9-inch pan, reduce baking time by 5-7 minutes (check at 30 minutesloaf pan, bake at 325°F for 50-55 minutes. Adjust oven racks to the middle position for even baking.
What's the secret to the perfect golden crunch top?
The egg wash (powdered sugar + water) is key! Brush it on after adding walnuts, then bake at 350°F without opening the oven. For extra crispiness, broil for 1-2 minutes at the end (watch closely!). The high heat caramelizes the sugar, creating that signature texture.