Banana Crumb Cake
This Banana Crumb Cake is what I make when I notice bananas sitting on the counter with more brown spots than yellow left on them. Instead of tossing them in the freezer and forgetting about them, I can have this cake mixed and in the oven in about 15 minutes, all in one bowl. It bakes up soft and moist with plenty of banana flavor, and the brown sugar crumb topping gives it that bakery-style finish without adding much work.

I’ve taken this cake to potlucks, sliced it for breakfast, and served it for dessert more times than I can count. It makes enough to feed a crowd, holds up well if you bake it ahead, and freezes without any trouble. It’s a simple, old-fashioned banana cake that fits right into a Southern kitchen and always gets eaten.
Before You Get Started
- Use very ripe bananas: The more brown spots, the better. Overripe bananas mash and blend easier and give the cake a deeper banana flavor.
- Soften the butter: Soft butter blends smoothly into the banana mixture. If your butter is cold, microwave it at low power in short bursts so it softens without melting.
- Pick your pan size: You can use two loaf pans or two 8×8 pans. If you use loaf pans, expect the bake time to lean closer to the longer end.
- Make crumbs that hold together: When cutting the butter into the topping, aim for a mix of small crumbs with a few pea-sized pieces. That gives you a topping that bakes crisp and buttery instead of powdery.
Recipe Ingredients

- sugar
- ripe bananas
- milk
- self-rising flour
- light or dark brown sugar
- unsalted butter
- eggs
- vanilla extract
How to Make Banana Crumb Cake
1. Prepare the Batter
Start by peeling the bananas and placing them in a large mixing bowl. Add the granulated sugar and mix until the bananas are completely liquefied.
Add the butter and continue mixing until it’s well blended with the banana mixture. Stir in the flour, eggs, milk, vanilla extract, and nuts if using. Mix just until everything is combined.




2. Prepare the Pans
Spray two loaf pans or two 8×8 baking pans with cooking spray.

3. Make the Crumb Topping
In a medium bowl, add the flour, brown sugar, and butter. Use a long-tined fork or pastry cutter to cut the butter into the mixture until the largest pieces are about the size of peas, with smaller crumbs throughout.


4. Assemble the Cake
Pour one quarter of the batter into each pan to form the base layer. Sprinkle one quarter of the crumb topping evenly over each layer.
Divide the remaining batter between the pans, then top with the remaining crumb mixture.



Bake
Bake at 350°F for 45 minutes to 1 hour, until a toothpick inserted into the center comes out clean.
Allow the cake to cool slightly before slicing.


Storage
Store leftover banana crumb cake in an airtight container at room temperature for up to two days. For longer storage, freeze tightly wrapped slices for up to three months. Thaw at room temperature before serving.

Notes for Making Banana Crumb Cake
- Freeze bananas ahead: When bananas start turning brown, mash them and store in freezer bags labeled with how many bananas are inside. Three bananas per bag makes baking easy later.
- Add a glaze: For an even more indulgent cake, top your banana crumb cake with a simple vanilla glaze. Make by combining 1 cup of powdered sugar with 1–2 tablespoons of milk and 1 teaspoon of vanilla extract and drizzling it over the cooled cake.
- Spice it up: Add cinnamon or nutmeg to the crumb topping for extra warmth.
- Extra moist cake: Buttermilk can be used in place of regular milk.
- Make your own self-rising flour: For each cup of all-purpose flour, add 1½ teaspoons baking powder and ½ teaspoon salt.

Ingredients
Cake
- 2 cups granulated sugar
- 1 cup milk
- 1 cup chopped nuts, optional
- 2 cups self-rising flour
- 1 stick butter
- 2 eggs
- 3 bananas
- 1 tsp vanilla extract
Crumb Topping
- 1 stick butter
- 1 cup dark or light brown sugar
- 1 cup flour
Instructions
- Spray two loaf pans or 8×8 pans with cooking spray.
- Place peeled bananas in a mixing bowl and add sugar. Mix until bananas are liquefied.3 bananas, 2 cups granulated sugar
- Add butter and mix until creamed together with the banana mixture.1 stick butter
- Add all other ingredients and blend well.1 cup milk, 1 cup chopped nuts, optional, 2 cups self-rising flour, 2 eggs, 1 tsp vanilla extract
- In a medium bowl, place all of the topping ingredients. Cut together with a long-tined fork until well blended.1 stick butter, 1 cup dark or light brown sugar, 1 cup flour
- Pour 1/4 of the cake batter into each pan and top with 1/4 of the crumb mixture.
- Pour in the remaining batter and top with the remaining crumb mixture.
- Bake for 45 minutes to an hour at 350. The cake is done when a toothpick inserted in the center comes out clean.

Hello from the UK! Have just made this recipe (it’s in the oven as I type!) and was reading some of the comments when I saw someone mention milk. Milk?!! MILK????!! Only now do I realise I missed the blimmin’ milk out!! Gaaahhh!!! However, it still looks delicious but do you know what difference the lack of milk will make to the finished product? 🙂
I made this yesterday and it is delicious.
An even easier way to freeze bananas is to peel them, put them in freezer bags, THEN smoosh them in the bags & pop them in the freezer. No extra washing up, quick & easy! Here in Australia bananas are plentiful, but with the hot weather (we’re going into summer) they practically ripen on the way home! 🙂
Great tip Laura!! Thanks for sharing!!
I have used frozen bananas and also baby food bananas in my banana bread. It always is so moist. I’ll have to try this recipe!! It sounds so good!!! I love to read your comments as well as the recipes!
No baking soda?
Nope. Self rising flour covers that. No worries!
Hey Crumb Boss I was just browsing some viedos about cakes on youtube and then i saw this video ! IT WAS REALLY A LIFE SAVER! because christmas is near and i was planning on baking a cake for my family and friends and thought of making a red velvet cake for them, I WAS REALLY SURPRISED! on how easy your recipe is than the other red velvet cake recipes on the internet that ive seen and the way you make it is so SUPER FTW! so fast! BTW its hard to find buttermilk in our place so i researched about a substitute and i saw a Milk+LimeJuice mixture, will it be fine with the red velvet cake in your opinion? BTW im 18 yrs old and hoping to be just like you someday btw your oreo cupcakes is a brilliant idea putting oreo cookies inside the cupcakes hahaha never thought of that! gonna try all your recipes soon! when i save up some money ofcourse haha! taiki luvs crumb boss <3
Just made this, used cupcake pan, turned out GREAT!!!! yum yum yum! I see what the others mentioned about the crumb mixture, mine was not a consistency that could be sprinkled… I just added quickoats until it was managaeable, it was at least half a cup!! But then it was easy to spread them out 🙂 So good!!!
smells all banana-y in my house right now!!!