My keto chocolate flaxseed cake recipe is the perfect way to add more fiber and nutrition while on a low-carb keto diet. Personally, I'm always looking for delicious ways to add more fiber content while doing keto.
It's rich, tender, and deeply chocolatey, yet made with simple low-carb ingredients that help keep carbs in check.
Flaxmeal on its own isn't the most appetizing food to embrace, but when it's coupled with chocolate, well, it's a whole other thing.
Flaxseed meal is the secret ingredient in this cake. It adds a naturally nutty flavor, plenty of fiber, and a soft crumb that works beautifully in keto baking. When combined with cocoa powder and a touch of instant coffee, the chocolate flavor intensifies.
If you are looking for a way to add more Omega-3 to your keto diet, my low-carb chocolate flaxseed cake may be the solution you've been looking for.
If you can't consume nut or wheat flour, golden flaxseed meal could be your flour. This makes a rich, moist chocolate cake. It's gluten-free, dairy-free, paleo, and keto-friendly.
Top with a powdered confectioner's sugar substitute instead of frosting for ease.
If you prefer a more classic chocolate cake, then make sure you check out my Keto Hershey's Chocolate Cake or my Keto Chocolate Cream Cheese Pound Cake
Visit our complete collection of Keto Cake Recipes for delicious options.
Why You'll Love This Keto Chocolate Flaxseed Cake
- Deep chocolate flavor enhanced with cocoa powder and coffee
- High in fiber thanks to the flaxseed meal
- Naturally gluten-free and sugar-free
- Simple pantry ingredients that are easy to find
- Perfect for meal prep since it stores well in the refrigerator or freezer

Ingredients Needed
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- Coconut oil
- Hershey's cocoa powder
- Instant coffee
- Golden flaxseed meal measured and sifted)
- Coconut flour
- Baking soda
- Baking powder
- Salt
- Eggs, room temperature
- Vanilla extract
- Granulated sugar substitute
- Almond milk or coconut milk
- Water
- Confectioners sugar substitute for topping
Omega-3 is considered to be a healthy fat that's been shown to have heart-healthy effects. And for that reason alone, this girl is always looking to add more of it to her diet.
Flaxmeal also has lignans, which are high in antioxidants. Another benefit is that it's high in both soluble and insoluble fiber. Again, adding more fiber to your keto diet just makes sense.
Recent studies suggest that flaxseed might be able to protect us against certain diseases.
Not only is flaxseed good for us, but it's an inexpensive keto baking option.
Flaxseed Chocolate Cake

Only golden flaxseed meal should be used when making this keto chocolate cake. Regular flaxseed meal is too heavy and will produce an inferior crumb.
If you do not use golden flaxseed meal, your cake will be gummy, which is not what you want.
Although this cake is primarily made of golden flaxseed meal, I also add two tablespoons of coconut flour to enhance the texture of the cake.
That little bit of coconut flour really makes a difference, so do not skip using it.
I made this flaxseed chocolate cake with coconut oil so that it could be a dairy-free option.
However, if you can do dairy, I encourage you to use ½ cup of melted unsalted butter instead. The butter helps intensify the rich Hershey's cocoa flavor.
How To Make This Chocolate Keto Flaxseed Cake

Start by preheating the oven and preparing your baking pan. A 9-inch round cake pan or a 9x9 square pan works well for this recipe. Lightly grease the pan so the cake releases easily once baked.
In a small saucepan, gently melt the coconut oil over low heat. Once melted, whisk in the cocoa powder and instant coffee until smooth.
This mixture helps to intensify the chocolate flavor. Set the mixture aside while you prepare the remaining ingredients.
In a separate bowl, combine the dry ingredients by mixing together the sifted flaxseed meal, coconut flour, baking soda, baking powder, and salt. Sifting the flaxseed meal helps create a lighter cake texture.
Using an electric mixer, beat the eggs, vanilla extract, and sugar substitute until the mixture is smooth and well combined.
Slowly add the melted coconut oil and cocoa mixture to the eggs and continue mixing until fully incorporated.
Next, gradually add the dry flaxseed mixture to the batter, beating on low speed until everything is evenly combined. Pour in the almond milk or coconut milk along with the water and mix until a smooth batter forms.
Allow the batter to rest for about five minutes. This short resting period helps the flaxseed and coconut flour absorb moisture and slightly thicken the batter. Then stir again and pour batter into the prepared pan.
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Bake the flax cake until a toothpick inserted into the center comes out clean.
Once baked, allow the cake to cool completely on a wire rack before dusting the surface with a sugar-free confectioners sweetener for a simple, elegant presentation.
Storage Tips
This cake keeps very well, making it a great option for preparing ahead.
- Store the cake covered in the fridge for several days.
- For longer storage, freeze individual slices so you always have a quick keto dessert ready.
- Allow frozen slices to thaw in the refrigerator before serving.
The Best Sugar-Substitutes For This Sugar-Free Chocolate Flaxseed Cake
I have several options when it comes to which sweetener you can use in this recipe. I really like Lakanto Monk Fruit because the texture is spot on and because there is barely any aftertaste.
I'm also partial to Swerve, an erythritol oligosaccharides blend. It mostly has erythritol, but oligosaccharides are prebiotic plant fibers that help give it structure.
Some people prefer the stevia- and erythritol-based brand Pyure in baked goods.
However, I find that chocolate and stevia do not play well together and generally produce a greater aftertaste. This is because cocoa is already bitter and can further magnify the aftertaste.
So, I wouldn't recommend this recipe unless you're familiar with it and it's not an issue for you. If you go this route, make sure you use only half the amount called for in this recipe since it is doubly sweet.
Lastly, if you can't easily find a more natural sugar substitute, you can also use Splenda with great success.
I know not everyone would agree with me here, and I respect that, but in my book, it's still better than regular sugar.
When it comes to choosing the powdered sweetener to top the cake, you will have to use a confectioner's sugar substitute. Both Lakanto and Swerve have great ones.

Tag Us
I sure hope you will make this recipe for keto-friendly chocolate flaxseed cake. Please remember to tag us on Instagram and Facebook with your pictures if you decide to make them.
I can't tell you how encouraging it is to see how well you are all duplicating our little recipes.
Grab Our Books!
In case you don't know, I have authored two books for you, Essential Keto Bread and Essential Keto Desserts, both inspired by your requests over the years.
It's my prayer these keto cookbooks will help make keto a delicious breeze for you.
Join Our Jesus And Keto Movement
Looking for an online support system to help you stay on keto? As a family, we came to the keto diet, looking at it from a Christian perspective. As believers, we live our lives supported by God's grace.
So when the Holy Spirit led us to combine our Christian faith and the keto diet, we did so in hopes of finding lasting transformation. When we followed the Holy Spirit's prompting, we got on the path to real transformation.
Knowing firsthand the benefits of this decision, we have created a closed Christian group that is using the keto diet to transform their lives.
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Enjoy early access to recipes on the website before they go live. Plus, there are bonus recipes exclusive to the app. You can also create personal cookbooks to organize your favorite recipes.
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The app is loaded with hundreds of yummy recipes for breakfast, lunch, dinner, snacks, and even desserts!
Learn more by visiting our Fit To Serve Group App Page.
Keto Hershey's Chocolate Flaxseed Flour Cake (Gluten-Free)
This keto chocolate flaxseed cake is low in carbs, gluten-free, grain-free, sugar-free, dairy-free.
Ingredients
Keto Hershey's Chocolate Flaxseed Flour Cake
- ¼ cup coconut oil
- ¼ cocoa powder
- 1 teaspoon instant coffee
- 1 cup golden flaxseed meal
- 2 tablespoons of coconut flour
- 1 ½ teaspoon baking powder
- ½ teaspoon baking soda
- ¼ teaspoon salt
- 4 eggs, room temperature
- 1 cup of granulated sugar substitute
- ½ teaspoon vanilla extract
- 1 cup almond milk or coconut milk
- ¼ cup of warm water
Instructions
- Preheat the oven to 350F.
- Grease a 9-inch round cake pan or a 9x9 square pan.
- In a small saucepan, melt coconut oil over low heat.
- Whisk in cocoa powder and instant coffee and set aside.
- In a small bowl, mix together flaxseed meal that has been measured and sifted, coconut flour, baking soda, baking powder, and salt.
- Using an electric mixer, beat the eggs, vanilla extract, and sugar substitute until well combined.
- Add coconut oil /cocoa mixture to eggs and beat until well combined.
- Next, add flaxseed meal to the mixture and beat on low until well incorporated.
- Then add almond or coconut milk and water and combine until fully mixed.
- Allow the batter to sit for 5 minutes, then stir one last time before adding it to the greased baking pan.
- Bake the cake for 25-30 minutes or until an inserted toothpick comes out clean.
- Allow the cake to fully cool then sprinkle the confectioners sugar to the surface of the cake.
- Store cake in the refrigerator for 5 days or freeze for up to 3 weeks.
Nutrition Information:
Yield: 12 Serving Size: 1Amount Per Serving: Calories: 155Total Fat: 13.9gSaturated Fat: 8.4gCarbohydrates: 5.2gFiber: 2.9gSugar: 1.9gProtein: 4.5g










Madeleine says
Can I substitute 1/4 cup almond flour for the coconut flour?
Hilda Solares says
Hi Madeline, I have not tested that substitution and so not sure if it would work.
Trina says
Hi,
I love your flaxseed chocolate cake.
I substitute with coconut sugar, add raisin to the batter.
It is moistened when using flaxseed with chocolate. Very creative!
It turns out great!
Thank you for sharing your recipe.
(P.S. Do to inflammation I cannot use Erythritol and other form of substitute sugar)
Hilda Solares says
Hi Trina, Glad to hear the recipe has worked for you and it was easy to customize to your needs.
Scott says
Ok, 40 mins of baking and cooling off.... I'd say it came out fine. Looks like your pictures but a bit spongier than I would like. Maybe too much milk/water. Will probably try it again another time and tweak it a bit.
Dianne says
I have made this cake several times now. I do not put in the 1/4 cup of warm water as the batter is so thin. Is there a reason for the water?
Hilda Solares says
Hi Dianne, Have you ever made the traditional recipe from the back of the box? It also calls for water. My goal was to come as close as possible to that recipe. The batter is supposed to be thin. It creates an airier texture. I hope this explains it better.
Hibber says
I've made these 3 times. I would say that the full cup of sugar is the right amount, and anything less was pretty lightly sweetened. I make these as muffins, and get 9 muffins from one recipe. Each muffin has 5g of fiber, 3.5g net carbs, and about 150 calories. I would add 2T of psyllium husk to increase the fiber, since that's why I'm eating these.
Hilda Solares says
Glad to hear that you are enjoying the recipe!