Keto Banana Cake (Low Carb, Sugar-Free)

This keto banana cake has all the sweet, nostalgic flavor of classic banana cake without using real bananas. Instead, this low carb banana cake gets its ripe banana flavor from banana extract, keeping it sugar-free, gluten-free, dairy-free, and keto-friendly.

It bakes up moist and tender in a bundt pan with the help of almond flour, coconut flour, golden flax meal, and a little psyllium powder for structure.

The result is a delicious mock banana cake that tastes like a bakery-style treat but fits beautifully into a keto lifestyle.

If you have been missing banana desserts since going low carb, this recipe is such a fun way to enjoy that familiar flavor again without loading up on sugar or carbs.

It's perfect for a special occasion, like a brunch offering or an afternoon snack. It's so good that you'll have a hard time believing it's a ketogenic diet recipe.

One bite of my moist, low-carb banana cake, and you'll have a hard time believing there are zero bananas in it.

The best part is that it's also a dairy-free banana cake recipe, so it's a recipe that more people can embrace.

Be sure to check out our entire collection of keto cake recipes for more delicious options.

Why You'll Love This Keto Banana Cake

This keto banana cake recipe is perfect when you want a dessert that feels special but is still easy enough to make for a weekend treat.

Here's why it works so well:

• It has all the flavor of banana cake without real bananas
• It is sugar-free, gluten-free, grain-free, and dairy-free
• The bundt pan gives it a beautiful presentation
• Banana extract keeps the carbs low while adding classic flavor
• The warm cinnamon and nutmeg make it taste like a traditional banana spice cake
• It stores well, making it great for meal prep or holiday baking

It is sweet enough for dessert but also lovely with a hot cup of coffee or tea.

Are Bananas Keto?

Bananas are generally not considered keto-friendly because they are naturally high in carbs and sugar.

While bananas are a whole food, even one medium banana can contain enough net carbs to take up most of a strict keto carb allowance for the day.

That is why this recipe does not use mashed bananas or overripe bananas. Instead, it uses banana extract to give you that ripe banana flavor while keeping the cake low in carbs.

This is what makes it a true keto banana cake rather than just a lower sugar banana cake.

How This Cake Gets Banana Flavor Without Bananas

The secret to this mock banana cake is using a good-quality banana extract. Since a little goes a long way, you can get that familiar banana flavor without adding the natural sugar and carbs that come from real bananas.

For the best flavor, choose a banana extract that tastes like ripe bananas rather than candy. When paired with vanilla extract, cinnamon, nutmeg, and a brown sugar substitute, the banana flavor tastes warm, rich, and surprisingly close to the real thing.

This recipe was inspired by our popular keto banana bread, which is also gluten-free, sugar-free, and dairy-free.

Our banana keto cake is a little sweeter than our low carb banana bread recipe, plus it features vanilla icing.

This recipe can be customized by adding some chopped walnuts to the batter before baking for a slightly different flavor profile.

Keto Banana Cake Ingredients You'll Need

Disclosure: Some of the links below are affiliate links, meaning that, at no additional cost to you, I will earn a commission if you click through and make a purchase.

The following are the simple ingredients you'll need to make sugar-free banana cake.

The full printable recipe card, along with the nutritional facts, is at the bottom of the page.

• Finely milled almond flour
• Coconut flour
• Coconut oil I recommend using refined coconut oil, which has a neutral flavor
• Psyllium powder, for added fiber and structure
• Golden flax meal (must be golden as regular flax meal produces a gummier texture)
• Brown sugar substitute
• Sugar-free maple syrup for added flavor
• Banana extract
• Vanilla extract
• Cinnamon powder
• Nutmeg powder
• Sea salt
• Eggs, room temperature
• Coconut milk or almond milk

Sugar-Free, Dairy-Free Vanilla Icing

• Confectioner's sugar-substitute
• Almond or coconut milk
• Vanilla extract
• Pinch of salt

Best Banana Extracts (Banana Flavoring)

You may be wondering how you can enjoy a banana recipe without using any mashed bananas.

Well, that's where using a high-quality banana extract is the only way to gain flavor without the carbs. This is another brand I love.

It's perfect for anyone on a low-carb diet.

Clocking in at only 2 grams of net carbs per serving, the carb count makes it the best choice for a keto banana cake.

A high-quality banana extract is keto-friendly and can fit into your macros easily. And since a little goes a long way, it's an excellent option for anyone doing a keto diet who is missing the flavor of ripe bananas.

Not all banana extracts are the same, so choose wisely. You want an extract that has a ripe banana flavor. This, of course, is my personal preference.

OliveNation Pure Banana Extract works well in giving that rich, ripe banana taste without making it taste fake. 

Why This Recipe Uses A Blend Of Keto Flours

Keto baking works best when the ingredients are balanced. Almond flour gives this cake a soft crumb, coconut flour helps absorb moisture, golden flax meal adds structure, and psyllium powder gives the cake a better hold.

This combination helps create a moist keto banana cake that slices well and does not crumble apart.

For the best results, I do not recommend swapping the flours one for one.

Coconut flour is especially absorbent, so using more of it can make the cake dry. Regular brown flax meal can also make the texture gummy, so golden flax meal is the best choice for this recipe.

How To Make Keto Banana Cake In A Bundt Pan

Start by preheating your oven and greasing your bundt pan very well with coconut oil. This is important because keto cakes can be more delicate than traditional cakes, and a well-greased pan helps the cake release cleanly.

In a large bowl, combine the almond flour, coconut flour, golden flax meal, psyllium powder, baking powder, salt, cinnamon, and nutmeg.

In a separate bowl, mix the melted and cooled coconut oil with the brown sugar substitute, sugar-free maple syrup, banana extract, and vanilla extract. Add the eggs one at a time, mixing well after each addition.

Add the dry ingredients to the wet ingredients and mix until fully combined. Then add the almond milk or coconut milk and continue mixing until you have a thick cake batter.

Spoon the batter into the prepared bundt pan and spread it evenly. Bake until the cake is golden, set, and a toothpick inserted in the center comes out clean.

Allow the cake to cool in the pan briefly before turning it out onto a wire rack. Let it cool completely before adding the sugar-free vanilla icing.

Tips For The Best Low Carb Banana Cake

For the best texture and flavor, keep these tips in mind:

• Use finely milled almond flour, not almond meal
• Use golden flax meal for the best texture and color
• Do not skip the psyllium powder, since it helps with structure
• Grease the bundt pan generously so the cake releases easily
• Let the cake cool before adding the icing
• Use banana extract, not real banana, to keep the recipe keto-friendly
• Choose a banana extract that tastes like ripe banana rather than candy

Can I Add Nuts Or Chocolate Chips?

Yes, this keto banana cake is delicious with chopped walnuts or pecans folded into the batter. Sugar-free chocolate chips would also pair well with the banana flavor if you want a chocolate banana cake variation.

Just keep in mind that any add-ins will change the nutrition slightly, so you will need to adjust the macros if you are tracking closely.

Can I Use Real Banana In This Recipe?

I do not recommend using real banana if your goal is to keep this cake keto. Even a small amount of banana can increase the carbs quickly.

If you are following a more flexible low carb diet, you could experiment with a small amount, but the recipe as written is designed to give you banana flavor without the added sugar and carbs from real bananas.

How To Store Keto Banana Cake

Store your keto banana cake in an airtight container in the refrigerator for up to five days.

You can also freeze it for up to three weeks. For best results, freeze individual slices so you can thaw only what you need. Let the cake thaw overnight in the refrigerator, then enjoy chilled or gently warmed.

More Keto Mock Banana Recipes

Be sure to check out our other "banana recipes for more delicious options:

• Keto banana nut bread
• Keto banana pudding

Frequently Asked Questions

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As a fan of bundt cakes you might want to also check out our entire collection of keto bundt cakes. 

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