Desserts
This banana cake recipe with measurements delivers foolproof moisture in every slice, thanks to a secret combination of ripe bananas and buttermilk that keeps it tender for days. 💛 I developed this version after years of testing—no dry crumbs here. The precise measurements ensure perfect texture every time, whether you're baking for a crowd or just satisfying a sweet tooth. What sets this apart is the balance of ingredients: melted butter and vegetable oil create richness without heaviness, while a touch of sour cream adds extra moisture. The cake rises beautifully in the oven, developing a golden crust while staying soft inside. My grandmother's diner taught me that the best desserts are simple but never boring. By the time it comes out of the oven, you'll have a cake with that classic banana flavor but with a texture that's velvety and dense—no one will believe it's homemade. The recipe scales perfectly for sheet pans or Bundt cakes, and leftovers stay fresh for days when stored properly. For those with dietary needs, I've included adaptations that maintain the same moist texture. Let's get baking!
Ingredients for banana cake recipe with measurements
Ripe bananas, buttermilk, and sour cream—simple ingredients for cake that stays moist for days.
| Ingredient | Amount | Notes |
|---|---|---|
| Ripe Bananas 🍌 | 3 medium | Mashed until smooth |
| All-Purpose Flour 🌾 | 2 cups | Sifted for light texture |
| Granulated Sugar 🍚 | 1 ½ cups | White or light brown |
| Unsalted Butter 🧈 | ¾ cup | Melted, full-fat preferred |
| Vegetable Oil 🫒 | ¼ cup | Light or canola |
| Sour Cream 🥛 | ½ cup | Full-fat for moisture |
| Buttermilk 🥛 | 1 cup | Substitute with milk + vinegar |
| Large Eggs 🥚 | 2 whole | Room temperature |
| Baking Soda 🧂 | 1 tsp | Not baking powder |
| Ground Cinnamon 🌿 | 1 ½ tsp | Warm, not spicy |
| Salt 🧂 | ½ tsp | Fine sea salt |
| Vanilla Extract 🍯 | 1 tsp | Pure alcohol-free preferred |
| Walnuts 🌰 | ½ cup | Chopped, optional topping |
The bananas are non-negotiable here—look for ones with brown spots, not rock-hard ones. Trader Joe's or your local grocery store usually have perfect ones year-round. I always grab extra and freeze them for smoothies too. The butter and oil combo gives that classic richness without making the cake greasy. Melt the butter in the microwave for 40 seconds—just until it's liquid, not hot. And trust me on the full-fat sour cream—it makes all the difference in keeping this cake tender.
No buttermilk? Mix 1 cup milk with 1 tbsp vinegar or lemon juice, let it sit for 5 minutes. Short on walnuts? Pecans or even crushed cookies work as a topping. The vanilla extract can be imitation, but alcohol-free pure vanilla has better flavor. This recipe is flexible—double the batter for a Bundt cake, or halve it for cupcakes. The key is keeping the ratio of wet to dry ingredients balanced. If you're worried about overmixing, use a hand mixer on low.
This cake stays fresh for 5 days in the fridge, wrapped tightly in plastic. For longer storage, freeze slices wrapped in parchment—up to 3 months. I always bake two pans at once and freeze one immediately. The texture actually improves after a day or two—trust the process. And if anyone asks, no, it's not from a box. The secret's in the precise measurements and that buttermilk-sour cream combo.
Why You'll Love This Recipe
- No-Fuss Mix-In: I just mash those ripe bananas right in the bowl—no fancy prep, no straining. The flour and sugar blend in seconds, and the butter and oil keep it moist without fuss. Honestly, I’ve made this while chatting on the phone. (Yes, even on a Tuesday night.)
- Moist Magic: That combo of mashed bananas and butter? It’s like a hug for your taste buds. The cake stays soft for days, and the natural sweetness means I cut the sugar by half—still rich, still crave-worthy.
- Leftovers That Work: Slice it up and freeze portions for grab-and-go breakfasts. Or pack a piece in lunches—kids (and adults) will actually eat it. Between us, this is my go-to for school bake sales because it travels well.
- Pantry-Friendly Budget Win: Flour, sugar, butter—these are staples I already have. Ripe bananas? Free if you’re using them before they turn to mush. I’ve made this for under $3 per serving, and it feeds a crowd without breaking the bank.
Step-by-step instructions for banana cake recipe with measurements
Here's how to bake a banana cake that stays moist for days—no dry crumb in sight.
👨🍳 Step 1: Mash the Bananas and Mix Wet Ingredients
Start by mashing the 3 medium ripe bananas until completely smooth—no lumps allowed. I like to use a fork for this step, but a potato masher works too. The riper the bananas, the sweeter and more flavorful your cake will be. Transfer the mashed bananas to a large mixing bowl.
Add the 0.75 cup melted unsalted butter and 0.25 cup vegetable oil to the bowl. Stir these together until fully combined—they'll create a silky base for your cake. Next, whisk in the 1 cup buttermilk and 0.5 cup sour cream. These dairy ingredients are the secret to that signature moist texture. Finally, add the 2 whole large eggs and 1 tsp vanilla extract, mixing gently until everything is well incorporated. The mixture should be smooth and slightly thick.
👨🍳 Step 2: Combine Dry Ingredients and Fold Gently
In a separate bowl, sift together the 2 cups all-purpose flour, 1.5 cups granulated sugar, 1.5 tsp ground cinnamon, 0.5 tsp salt, and 1 tsp baking soda. Sifting ensures no lumps in your batter and creates a lighter texture. Give the dry ingredients a quick whisk to blend everything evenly.
Now, pour the dry ingredients into the wet mixture and gently fold together using a spatula. Start at the bottom of the bowl and fold upward to incorporate air without overmixing. Stop folding once the batter is just combined—you should still see some flour streaks. Overmixing develops gluten, which can make your cake tough. If you're using the 0.5 cup chopped walnuts, fold them in now too. They'll add a nice crunch to each bite.
🔥 Step 3: Prepare and Bake the Cake
Preheat your oven to 350°F and grease a 9-inch round cake pan or line it with parchment paper. I like to use a combination of butter and flour to grease the pan for extra insurance against sticking. Pour the batter into the prepared pan and smooth the top with a spatula.
Bake for 35-40 minutes or until a toothpick inserted in the center comes out clean. The cake should be golden brown on top and spring back slightly when pressed gently in the center. Real talk: your oven might run hot, so start checking at the 30-minute mark. If the edges are browning too quickly, tent the pan with aluminum foil to prevent over-browning while the center finishes baking.
⏰ Step 4: Cool and Serve for Maximum Moisture
Once the cake is done, remove it from the oven and let it cool in the pan for 10 minutes. This short rest prevents it from cracking when you transfer it. Then, carefully invert the cake onto a wire rack to cool completely. I know it's tempting to dig in right away, but waiting ensures the cake sets properly and stays moist longer.
Serve slices at room temperature for the best texture. The cake will stay moist for 3-4 days when stored in an airtight container at room temperature, or you can freeze it for up to 3 months. For extra moisture, brush the warm cake with a simple glaze made from powdered sugar and milk—just a quick drizzle makes all the difference!
Pro Tips For Making Banana Cake Recipe With Measurements
- Mash Bananas First: Don’t just toss in whole bananas—they’ll sink like stones and leave you with a dense, uneven cake. Mash them with a fork until smooth (a few lumps are fine), then let them sit for 5 minutes to release more liquid. This makes the batter lighter and prevents a gummy texture.
- Mix Wet Ingredients Separately: I learned this the hard way—adding flour to wet ingredients too soon creates a gloopy mess. Whisk the melted butter, oil, sugar, and eggs first, then gently fold in the mashed bananas. Only then add the dry ingredients in stages, mixing just until combined. Overmixing = tough cake.
- Skip the Overfilling: A 9-inch pan is your friend here. Fill it only halfway (about 2 cups of batter) or the cake will spill over and bake unevenly. If you’re using a loaf pan, stop when it’s 3/4 full—banana cakes rise surprisingly well, but they won’t forgive being crammed.
- Use Room-Temp Butter: Cold butter from the fridge will create pockets of unmelted fat in your cake, leading to dry spots. Let it sit for 20–30 minutes until it’s soft but not liquid (press your finger in—it should leave a slight indent). This ensures even distribution and a tender crumb. (Yes, even if you’re impatient like me.)
Serving suggestions for banana cake recipe with measurements
Classic Toppings
Warm the cake with a sprinkle of toasted walnuts or pecans—I like them toasted in a dry skillet for 2-3 minutes until fragrant. A drizzle of honey butter (mix ¼ cup softened butter with 1 tbsp honey) adds Southern charm. For something lighter, try whipped cream with a dusting of cinnamon—it’s a crowd-pleaser at my grandmother’s diner. 🌰
Creamy Frostings
My go-to is a simple vanilla buttercream—mix 1 cup softened butter, 3 cups powdered sugar, 2 tbsp milk, and 1 tsp vanilla extract until fluffy. For a tangy twist, swap in cream cheese frosting (blend 8 oz cream cheese, ½ cup butter, 2 cups powdered sugar, and 1 tsp lemon juice). Both pair perfectly with the cake’s natural sweetness. 🍯
Fruit Pairings
Fresh strawberries or blueberries add brightness—slice them thin and arrange on top. For a tropical vibe, try mango slices or a passion fruit coulis> (blend 2 passion fruits with 1 tbsp sugar). Even a scoop of vanilla ice cream elevates the dessert. My kids love this combo! 🍓
Gluten-Free Adaptations
Serve with gluten-free vanilla pudding> (made with cornstarch or arrowroot powder) for those avoiding flour. A dairy-free whipped topping> (coconut cream + powdered sugar) works too. The cake’s natural moisture holds up well—just ensure toppings complement rather than overpower the flavor. 💛
Make-Ahead Serving
Slice the cake and store in an airtight container> in the fridge for 3-4 days. Reheat slices in the microwave for 10-15 seconds> to restore moisture. For parties, assemble a banana cake trifle>—layer cake with vanilla custard> and toasted nuts>. It’s a showstopper! ⏰
Nutrition facts
Frequently asked questions about this banana cake recipe
Why does this banana cake stay moist longer than others?
The secret lies in the buttermilk and sour cream combo—these dairy ingredients create a tender crumb that locks in moisture. Plus, the melted butter and oil keep the texture rich without drying out. The cake actually improves after 1-2 days when stored properly, unlike boxed mixes that go stale quickly.
Can I substitute Greek yogurt for sour cream?
Yes, but use ½ cup plain Greek yogurt plus 1 tbsp milk to match the moisture level. The yogurt adds protein that helps stabilize the texture, but it won't be quite as creamy. For best results, stick with full-fat sour cream—the fat content is key for that classic moist banana cake texture.
What if my bananas aren't ripe enough?
Use 2 extra-ripe bananas and 1 slightly green one to balance the sweetness. For the green banana, peel it and place it in a paper bag with an apple overnight—the ethylene gas will help ripen it. If you're in a hurry, microwave the unpeeled banana for 30 seconds to speed up the process.
How do I make this recipe gluten-free?
Replace the 2 cups all-purpose flour with a 1:1 gluten-free baking flour blend (like Bob's Red Mill). Add ½ tsp xanthan gum if your blend doesn't include it. For best results, let the batter rest for 10 minutes before baking—this helps the gluten-free flour hydrate properly. The texture will be slightly denser but still moist.
Why did my cake sink in the middle?
This usually happens from overmixing or opening the oven door too early. For next time, fold the batter just until combined (you should see flour streaks). Also, check doneness at 30 minutes—some ovens run hotter. If the edges brown too fast, tent with foil to protect the center while it finishes baking.