Keto Chocolate Zucchini Cake has a tender, moist crumb and a rich sugar free chocolate glaze. What a fabulous way to use up some of that summer squash!
This keto zucchini cake is so rich and moist, it makes me do the happy dance. You know that dance, surely. That happy, spontaneous wiggle that can only come from putting a bite of something utterly delectable on your tongue.
I have multiple keto chocolate cake recipes on this website, each with a different twist. But every single one of them makes me do that happy dance.
And this is one of my favorites to make in the summer. It’s simple to make and turns out beautifully every time. I take this keto bundt cake to many parties and get togethers and it always meets with rave reviews!
Why you will love this recipe
Anyone who has ever grown their own zucchini knows how crazy it can get come mid-summer. You find yourself picking three or four large ones on a daily basis and you can’t keep up.
So any delicious recipe that includes zucchini is a good one! My classic Keto Zucchini Bread becomes very popular at this time of year. But this cake is a nice way to switch it up for a lovely dessert. With only 4g net carbs per serving, it fits well into a keto diet.
This keto bundt cake is not overly sweet, but the chocolate glaze makes it extra appealing. And I’ve simplified the recipe so that you can whip it up quickly and easily. It’s perfect for summer gatherings!
It even freezes well too. You can freeze it with or without the glaze.
Reader reviews
“This cake was absolutely incredible! It wasn’t dry in the slightest and even got two thumbs way up from my sweets-loving 7 year old (who could NOT believe there was zucchini in it). You truly are the queen of keto baking!” — Courtney
“I followed the recipe to the letter and I have to say that this cake is so moist and it has an absolutely lovely texture! The ganache is heavenly. Thank you Carolyn for making it so much easier and more satisfying to live a Keto lifestyle. How can you say that you’re missing out on anything when you provide us with recipes like this! ??” — Laura
“I made this cake for the first time 2 days ago. So nice, great texture and very moist. I can’t get Swerve, so I used erythritol and added a bit of liquid stevia, both in the cake and in the glaze. We really love this cake! Thanks again for all your recipes.” — Robin
Ingredients you need
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- Zucchini: This is a wonderful recipe to use up some fresh zucchini. You can grate it with a box grater or a food processor. And with this updated recipe, there is no need to salt and drain it!
- Keto flours: I use a combination of almond flour and coconut flour for this cake. The coconut flour helps offset the moisture of the zucchini. For a nut-free option, you can substitute with sunflower seed flour.
- Sweetener: You can use almost any sweetener you like best for the cake, but the glaze requires a powdered sweetener like Swerve Confectioners. See the Expert Tips section for more sweetener options.
- Cocoa powder: I prefer Dutch process cocoa for its deeper chocolate flavor.
- Protein powder: Like many of my other keto cake recipes, I use unflavored whey protein to help it rise and be more fluffy. You can also use egg white protein powder or pea protein powder.
- Heavy whipping cream: The glaze is a ganache-style glaze so it uses heavy cream as the base. You can also use coconut cream for dairy-free.
- Unsweetened chocolate: Make sure to use 100% unsweetened chocolate, which means no sweetener whatsoever. If you do choose to use keto chocolate like ChocZero, you will need to add a bit more to thicken the glaze.
- Pantry staples: Eggs, butter or oil, baking powder, salt, vanilla extract.
Step-by-step directions
1. Grate the zucchini: Use a box grater or a food processor with a grating disk to grate the zucchini finely. Measure out 2 cups, do not pack it. No need to salt and drain it either.
2. Whisk the dry ingredients: In a large bowl, whisk together the almond flour, sweetener, cocoa powder, coconut flour, whey protein, baking powder, and salt.
3. Add the wet ingredients: Add the eggs, melted butter, and vanilla extract, then add the zucchini and stir until well combined. If your batter is very thick, add liquid one tablespoon at a time. It should be easily spreadable but not pourable.
4. Bake: Spread batter in a well-greased bundt pan and smooth the top. Bake at 325ºF for 45 minutes or until the top is just firm to the touch. Remove and let cool 30 minutes before flipping out onto a platter to cool completely.
5. Prepare the glaze: In a medium saucepan over medium heat, combine cream or coconut milk and the sweetener. Bring to just a simmer, then remove from heat and add chopped chocolate and vanilla. Let sit 5 minutes and then whisk until smooth.
6. Drizzle over: Let the glaze cool for a few minutes to thicken, then drizzle over the top of the cake and let set.
Expert tips
Bundt pans can be tricky, especially if they have lots of small crevices that cake can stick in. I highly recommend getting a real good non-stick, non-toxic bundt pan like this one from USA Pan. It’s pricier, but it lasts forever and always releases the cakes easily.
You can make the cake in other pans, like a 9-inch springform pan or a 9×13 rectangular pan. It would even make great low carb cupcakes. But the baking time will vary depending on what pan you use so keep your eye on it. It’s an incredibly versatile keto cake recipe, so sock this one away in your arsenal for all that summer zucchini.
Dairy-Free Option: Use egg white protein powder or a vegan protein powder in the cake, and swap butter for coconut oil or avocado oil. Then use coconut cream for the glaze.
Sweetener Options
The cake can be made with your favorite sweetener of choice, but do keep in mind that allulose can make it cook faster and darken more on the part that touches the pan. It can even taste a little burned. So keep your eye on it if you swap sweeteners.
The glaze needs a powdered sweetener for the right consistency.
Frequently Asked Questions
Yes! Zucchini is very keto friendly. One medium-sized zucchini has only about 4 grams of net carbs. Now you know why it is so popular with those who follow a low carb diet.
Leftovers can be kept on the counter for up to 2 days in an airtight container. I recommend covering the leftovers and refrigerating it for up to a week. You can also freeze this cake for up to 3 months.
This keto chocolate zucchini cake recipe has 7.5g of and 3.8g of fiber per serving. That comes to 3.7g net carbs per slice.
More delicious keto bundt cakes
Keto Coconut Cake
What could be better than this fluffy white Keto Coconut Cake? It’s easy to make, and it’s so light and airy, it’s like biting into a fluffy coconut cloud. Nut-free and sugar free. If you love baking with coconut flour, this is the cake for you!
Keto Lemon Poppy Seed Cake
Keto lemon poppy seed cake is a classic dessert and perfect for Spring. This bundt cake recipe is low carb and grain free so it fits in well with your healthy keto diet.
Keto Gingerbread Cake
Heavenly keto gingerbread cake! This tender cream cheese pound cake is flavored with ginger, cinnamon, and cloves for a classic low carb holiday dessert.
Keto Chocolate Zucchini Cake
Equipment
Ingredients
Cake
- 2 cups finely grated zucchini about 10 ounces
- 2 cups almond flour
- ⅔ cup Swerve Sweetener
- 6 tablespoon cocoa powder Dutch process
- ⅓ cup coconut flour
- ⅓ cup unflavored whey protein powder
- 1 tablespoon baking powder
- ½ teaspoon salt
- 4 large eggs
- ½ cup butter melted
- 2 teaspoon vanilla extract
- Cold coffee or water, as needed
Glaze
- ½ cup whipping cream or coconut milk
- ¼ cup confectioner’s Swerve Sweetener
- 2 oz unsweetened chocolate finely chopped
- ½ teaspoon vanilla extract
Instructions
Cake
- Preheat oven to 325ºF and grease a large bundt pan (9 to 12 cup capacity) very well.
- In a large bowl, whisk together the almond flour, sweetener cocoa powder, coconut flour, whey protein, baking powder, and salt.
- Add the eggs, melted butter, and vanilla extract, then add the zucchini and stir until well combined. If your batter is very thick, add liquid one tablespoon at a time. It should be easily spreadable but not pourable.
- Spread the batter in the prepared pan and smooth the top. Bake 40 to 50 minutes, or until the top is just firm to the touch.
- Let cool in the pan for at least 30 minutes, then flip out onto a wire rack or cake platter to cool completely. Do not let it cool in the pan longer than 60 minutes or it will start to stick again.
Glaze
- In a medium saucepan over medium heat, bring the cream to a simmer. Remove from heat and add the chopped chocolate. Let sit a few minutes to melt, then add the sweetener and vanilla extract and whisk until smooth.
- Let the glaze cool for a few minutes to thicken, then drizzle over the top of the cake and let set.
Katie | Healthy Seasonal Recipes says
This recipe is making me look forward to that stretch of summer when I am swimming in zucchini from the garden! I can’t wait to try it!
Taylor @ Food Faith Fitness says
Put me down for a few slices of this!
Jennifer Farley says
Amazing! I love the healthy ingredients!
Lidia says
Carolyn, I just did this recipe yesterday, it got stuck a little in pan, also I would like to know how is the best way to store it, thanks
marguerite lindemann says
I just made this cake. and it turned out great. I did use more sweetener as I like it sweet. I tasted the cake batter before cooking it .I also used more zucchini, almost 3 cups and it was super moist. The glaze was a little loose and I did it in the microwave instead of the stove top. no problems with it. My husband loved it and this will now be my go to cake. thank you for the recipe.
gerry speirs says
Killer cake!!
Cookin Canuck says
This cake looks positively additive! I’m thinking it would be perfect with an afternoon coffee on the side.
Erin @ Dinners, Dishes, and Desserts says
Baking with zucchini is the best, this cake is perfectly chocolate-y and moist!
Jennifer Farley says
What a lovely cake! That ingredient list is amazing too! Must try!
Jennifer Blake says
I love a good chocolate zucchini bread, but a whole bundt cake? Yes please!
Robin says
Hi Carolyn,
I made this cake for the first time 2 days ago. So nice, great texture and very moist. I can’t get Swerve, so I used erythritol and added a bit of liquid stevia, both in the cake and in the glaze. We really love this cake! Thanks again for all your recipes. I did get you cookbook for Christmas, and I love it too.
Carolyn says
Thanks, Robin.
Rhea says
Hi,
Almost your recipes call for Whey Protein Powder and since I am totally against adding extra protein to my diet can it be substituted by anything else such as flax seed meal or extra egg whites. If possible something easy to find.
Carolyn says
In the absence of gluten, which is a protein itself, substituting another dry protein powder like whey or egg white protein helps the baked goods rise and hold their shape. I add no more than what is a single serving (scoop) of protein powder, which has about 18 to 20g of protein per scoop. This means that over a whole cake which serves 12 to 16, you are adding no more than one or two grams of protein to your daily diet.
However, if you choose to leave it out, I do not guarantee your results. Flax seed meal ALSO has protein and you’d be adding about 8g of protein with a similar amount of flax seed and it won’t have the proper consistency. And of course, adding egg whites also again adds protein and you’d throw off the liquid content of the batter and it would be a disaster.
Jackie Mack says
This cake is the most amazing cake ever! Made it three times! Perfect every time! I don’t use any salt and I don’t squeeze out moisture. I just put a paper towel in the bottom of the container I use to store the grated zucchini in overnight in the frig and that’s it. This cake makes me not miss the one from the local bakery anymore! Thank you Carolyn!!! You Rock!
Laura Pierson says
I followed the recipe to the letter and I have to say that this cake is so moist and it has an absolutely lovely texture! The ganache is heavenly. Thank you Carolyn for making it so much easier and more satisfying to live a Keto lifestyle. How can you say that you’re missing out on anything when you provide us with recipes like this! ??
Cheryl says
I’ve been making a flour chocolate zucchini cake for 20+ years. I actually don’t grate the zucchini fine, just shred in the processor and put in strainer. I squeeze it by hand just before stirring in batter. It’s made like a snack cake in a 9×13 pan with a sprinkle of chocolate chips and walnuts on top (no icing). Also 3 eggs, buttermilk, cinnamon and cloves. I am looking forward to trying your recipe just didn’t have enough swerve left. I want to try to do similar to my old recipe, thinking about adding vinegar to my cream? Had great success with your brownie cheesecake!
Carolyn says
I think you could take this recipe and bake it in the same pan with similar results. And I can’t see why souring your cream a bit wouldn’t work.
Stephanie Morgan says
This looks amazing! Can’t wait to try it! I am allergic to coconut. Do you have any suggestions as to what I can substitute for the coconut flour? Would you increase the almond flour by the same? Or the protein powder? Would I need to reduce liquid or egg? Thanks so much!
Carolyn says
Use another cup of almond flour in place of the 1/3 cup of coconut flour.
Nicole Pelletier says
A couple of questions, i only have chocolate protein mix on hand, can i use that maybe double and omit the cocoa powder? And could this be cupcakes instead?
Carolyn says
Yes, it makes great cupcakes. No, just add the chocolate protein powder in addition to the cocoa.
Anita says
This is delicious. Needs just a bit more sugar, but is moist and flavorful. I’m so glad to find a great cake recipe, thanks.
Carolyn says
Thank you!
Priscilla says
My husband recently got diagnosed with Type 2 diabetes, I need to radically change my ways of cooking. I’m learning about low carb and sugar-free baking. Is it necessary to add whey protein powder? Can I leave it out or substitute for something else? We’re on a tight budget and after shopping for many new pantry staples, I’m unable to purchase the protein powder, the one I was looking at was over $20. I might buy it later in the future though. What brand of unsweetened chocolate did you use for the glaze? Can I also add raw cacao powder for the cake or unsweetened dark cocoa powder? Would monk fruit sweetener be okay for the cake instead of granular swerve? I’m so interested in trying your recipe, we have plenty of garden zucchini harvest and my family loves chocolate. This looks delish and the many other recipes you have. Thanks! 🙂
Carolyn says
Hi Priscilla. I understand the tight budget and you can skip it but… things rise better with it. Here is a video I did on Facebook to show readers why I use it. https://www.facebook.com/AllDayIDreamAboutFood/posts/1798732540154127
Raw cacao powder or unsweetened cocoa powder should be fine for the cake, although the raw cacao may be more bitter. Monk fruit would be fine, I just don’t know the conversion of it. Hope that helps!
Priscilla says
Great video, thanks for sharing! Now it makes sense. However, I use a lot of organic and non-GMO ingredients in baking. I try to avoid too much dairy, I can tolerate some but not all. Like I can do cheese, yogurt, etc. but not dairy ice cream. If I eat too much dairy, I get sick. I noticed you use Bob’s Red Mill whey protein powder, is that free from GMOs? I found goat whey protein powder online, woud that work? Also what brand of unsweetened chocolate did you use for the glaze? I usually like semi-sweet and semi-dark chocolate but I have to make everything sugar-free for my husband. I apprediate your time.
Carolyn says
You can use any protein powder here and goat whey or egg white protein is a great choice. For unsweetened chocolate, I typically use ghirardelli or Scharffenberger.
Priscilla says
Thank you so much! I had to use some of my savings, I ordered the goat whey protein powder. I can’t wait to try your cake recipe.
Angelique says
I had tons of zucchini, I had a huabamd with a birthday, and this was the best birthday cake ever! Thanks for the great recipe!!!