This banana coffee cake is absolute bliss. Not only is moist like banana bread, but it’s also swirled with cinnamon sugar and topped with a sweet and crumble crumble. If you love coffee cake, you definitely need to try this recipe!
What makes this banana coffee cake SO good?
I made this when I had a friend visiting from out of town and we probably had two to three pieces a day for the entire weekend. We could not be stopped. It was out of hand. We have no regrets.
To break this down, you’ve got a super moist and dense cinnamon banana coffee cake with a sweet and crunchy brown sugar crumble AND an icing drizzle. Not to mention it’s insanely easy to make. Here’s what to expect from this banana coffee cake recipe:
- Banana Cake – But it’s more like banana bread! It has the perfect amount of bananas and is incredibly moist.
- Cinnamon Swirl – A layer of brown sugar and cinnamon is sprinkled in the middle, adding even more flavor.
- Brown Sugar Crumble – A hefty layer of cinnamon sugar crumble is added on top! It has just the right amount of sugar, flour, and butter making it chunky and crispy but not overly sweet.
- Icing – This is optional, but the icing drizzle really seals the deal.
Tips for making banana coffee cake
There are quite a few components to this banana crumb cake, but they’re all very easy to make! Here are my top tips to ensure your banana cake turns out just right:
- Flour – Measure the flour by grams instead of cups. Weighing is much more accurate than measuring by volume. If you don’t have a kitchen scale to measure, simply spoon the flour into the measuring cup and level it off with a flat edge. Don’t pack it in or shake it down, and do not scoop directly into the flour bag. This will add WAY too much flour to the batter. This goes for the crumble too!
- Banana – About 2 medium bananas will make up 3/4 cup, but always always always measure the banana when baking. It’s important than exactly 3/4 cup is used. Too little and the cake won’t be as moist, too much and the cake will be too soft and mushy.
- Mixing – After the dry ingredients are added, very carefully mix the batter with a rubber spatula. Over mixing can lead to a tough cake, so take it slow and steady and stop mixing right when the flour is fully absorbed.
- Layering – After sprinkling the cinnamon sugar layer, scoop spoonfuls of the remaining batter on top. Space them out evenly so that when you spread it into a level layer, it won’t disturb the cinnamon sugar underneath.
- Crumble – Once the crumble has chilled, it should turn very firm. Break it up with a fork or knife and sprinkle it in an even layer on top of the cake batter. Make sure to include both large and small chunks of crumble as this variation will lead to the best crunchy top.
How to bake banana crumb cake
This recipe took SO much trial and error, mainly because I wanted a really moist banana cake but it also needed to be solid enough to hold up the weight of the crumble.
The trick is to bake the coffee cake low and slow. It bakes at 325F for about 40-45 minutes which is nearly double the typical bake time for coffee cake.
It’s ready when the crumble is a light golden brown and a toothpick in the center comes out clean. The surface should also be evenly puffed.
When to serve banana coffee cake
Once the cake has baked, allow it to cool in the pan for about 30-40 minutes. It’s best served when its just slightly warm.
It’s also best to drizzle with the icing at this point because it won’t melt and disappear into the crumble. Once cooled, lift the cake out of the pan using the parchment paper over hang. Then drizzle with icing, slice, and serve!
For more BEST EVER banana recipes, check out my:
- Chocolate Chip Banana Bread
- BEST Banana Scones
- Banana Tres Leches Cake
- Peanut Butter Banana Upside Down Cake
Make sure to tag me @butternutbakery on Instagram if you make this banana coffee cake. I love seeing my recipes come to life in YOUR kitchen! To pin this recipe and save it for later, you can use the button on the recipe card, the buttons above or below this post, or on any of the photos above. Happy baking!Print
Banana Coffee Cake
- Total Time: 1 hour 10 minutes + 30 minutes cooling
- Yield: 16 slices
This banana coffee cake is like a cross between banana bread and cinnamon coffee cake. It’s super moist like banana bread but with a cinnamon sugar swirl and sweet crumble topping!
- 1 1/2 cups (195g) all-purpose flour
- 3/4 teaspoon baking soda
- 1/2 teaspoon salt
- 6 tbsp unsalted butter, melted
- 1/2 cup (100g) granulated sugar
- 1/2 cup (100g) light brown sugar, packed
- 1/3 cup (80g) sour cream, room temp
- 1 large egg, room temp
- 2 tsp vanilla extract
- 3/4 cup (190g) mashed ripe bananas (about 2 medium bananas)
- 3 tbsp light brown sugar
- 1 1/2 tsp cinnamon
- 1 cup + 2 tbsp (150g) all-purpose flour
- 1 tsp cinnamon
- 1/3 cup (65g) granulated sugar
- 1/3 cup (65g) light brown sugar, packed
- 1/2 cup (110g) unsalted butter, melted
- 1/2 cup powdered sugar
- 1 tbsp milk
- OR top with homemade salted caramel
- Preheat your oven the 325F and grease and line an 8×8 baking pan, allowing the paper to hang over the sides for easy removal.
- Start by making the crumble – Combine the flour, cinnamon, and sugars in a bowl. Then mix in the melted butter. The mixture should resemble wet sand. Place the bowl in the refrigerator to chill while the rest of the cake is made.
- For the banana cake, whisk together the flour, baking soda, and salt in a medium bowl. Set aside.
- In a large mixing bowl, whisk together the sugars and butter.
- Once fully combined, whisk in the sour cream, egg, vanilla, and mashed banana.
- Gently mix in the dry ingredients using a rubber spatula.
- Spread half of the batter into the pan. Combine the cinnamon sugar mixture and sprinkle an even layer on top.
- Cover with the remaining batter and gently spread it even.
- Remove the crumble from the refrigerator. It should now be cold and firm. Crumble it on top in an even layer.
- Bake for 40-45 minutes or until a toothpick in the center comes out clean with a few moist crumbs.
- Allow the cake to cool for about 30-40 minutes.
- While it cools, whisk together the powdered sugar and milk to make the icing. It should make a glue-like consistency. If it’s too thick, add 1/2 tbsp of milk at a time until it turns smooth.
- Drizzle the icing on top of the slightly warm cake and enjoy!
- Prep Time: 30 minutes
- Cook Time: 40 minutes
- Category: Dessert
- Method: Baking
- Cuisine: American
Keywords: banana coffee cake, banana crumb cake, banana cake, banana coffee cake recipe
Am I able to sub 1:1 gf flour instead of regular for this recipe?
yes I think that could work!
Can GF flour be substituted to make this celiac friendly??
Yes I think that could work here! Sub in the same amount of flour
Sandra Sandkuhl says
Hi. I was hoping to make this for a bake sale for school. I was going to use the disposable cardboard pans, either 6” round or loafs. Would one work better than the other? Could I double or triple the recipe at that point, since the pans are smaller?
Thank you so much!
I think you could bake this recipe in two loaf pans if that helps!
The best banana coffee cake! The flavors compliment each other so well. Just one thing, it took me longer to bake it. I have a gas stove, so I’d suggest dialing it up to 350 degrees for the last 10 minutes if you have one too.
I can’t find how much coffee this recipe requires…help, please 🙂
No coffee! Coffee cake is just a term for this type of dessert as it is usually enjoyed in the morning with a cup of coffee.
What could I substitute sour cream with for a dairy free option?
Try coconut cream! It’s the thick creamy part that separates in a can of full fat coconut milk
Can I use coconut yoghurt?
yes I think that should be fine!
This banana coffee cake is fantastic! My kids having been loving it for breakfast.
Made this tonight and YUM!! For anyone wondering, all purpose GF flour DID work in this! It’s the first recipe I’ve ever made that I just used GF flour in place of regular, so I was super skeptical, but it turned out amazing! I did have to bake it for about 65 minutes, but I’m not sure if that was from the GF flour or that I was using a pretty old oven! The cake is incredibly moist, and the glaze not only “finishes” this off just right, but it also helps keep the crumble together! I mixed a little vanilla and maple syrup into my glaze and it’s delicious!
Yay thank you for sharing!! Yes, gf flour can sometimes need a bit more time to bake because it’s not as absorbent as regular flour but I’m glad to hear it worked out!
I made this yesterday. It’s so good. I love that you make the crumble with melted butter and then refrigerate it so it gets crumbly rather than cutting cold butter into flour. So much easier!
Love this idea. Always have bananas in the house that have to be dealt with and instead of doing banana bread (although mine is delicious) it is nice to have another option. My only question…. Can it be frozen? If so, when? How long can it stay in the freezer?
I think it could be! Let it cool completely, then wrap and freeze. It should keep for a couple months.
Does this double easily—and bake in a 13×9?
I think that could work! Add about 10-15 minutes to the bake time 🙂
i made this…omg. SO GOOD! i love banana and it was so delicious; so moist, the crumb topping was delish too 🙂 i decided not to add the frosting drizzle and it was still perfect.
Carolina Nario says
I usually make regular banana bread and thought of changing it slightly today. This recipe is awesome! So moist and yummy and just the right amount of sweetness. I did skip the icing topping. I also did not have sour cream but I had Greek yogurt so mixed about 1/4cup milk with 3tbsp of the yogurt just so it’s not too thick. Thank you for another wonderful recipe! 🙂
Came out so moist and rich!! Everyone loved it!
I can always count on your recipes being moist! This was soo delicious! Will be a staple 🙂
I made one today but the cake part is not cakey fluffy texture, is my crumble too heavy hence the cake cant rise properly? Im using yogurt instead of sour cream. Help me!
The taste however is awesome!
Oh no! Did you measure out the banana? Too much banana can create a very wet batter.
Chelsea Owens says
Came out great. I didn’t add as much sugar because I wanted it to be more of a breakfast treat than a dessert and it still came out perfect.
Jill Hill says
Excellent! Loved this coffee cake! Only change I made was used dark brown sugar (as that’s what I had on hand), but it worked well! Thanks for another wonderful recipe to add to my arsenal!