Fluffy and tender, this delicious low carb blood orange rum cake is super easy to make in your blender! Get it into the oven in just five minutes, and you can be enjoying a slice of this incredible low carb cake in less than an hour! The gorgeous blood orange glaze is optional but recommended!

These photographs are from February of last year, but because of our move to Belize I never got around to posting the recipe. By the time life had settled down and I was ready to get back to work, citrus season was over so I decided to wait on posting this one.
It wasn’t easy to hold off though, because this glazed blood orange rum cake is hand’s down one of the best cakes I’ve ever made! If not THE actual best. I kid you not.

Now you might be expecting that “the best low carb cake I ever made” recipe would come with a lengthy list of complicated instructions. Not so! I threw everything into the blender and that was it!
TRUE STORY.
Easy AND incredibly delicious? You guys know that’s my jam.
If you make this cake (and you definitely should), be prepared for the batter to be thick. It won’t pour, so you’ll have to spoon it out of the blender, which will be the most annoying part of making this cake.
Don’t be alarmed and send me a ton of emails (I beg you,) it’s supposed to be like that.

I used an old brioche pan that I bought at an antique shop for this blood orange rum cake, and it worked perfectly. You can also use a bundt pan, though the cooking time will likely be a few minutes less. Or if you don’t really care about looks you can do this in a 9 x 9 cake pan as well.
If you want the look of a brioche like mine, you can find a similar pan on Amazon. This silicone brioche pan has a nice pattern and the silicone will make it so much easier to get out. I was terrified before I unmolded my cake that it would stick, but thanks to A LOT of butter, it came out with no issues. Still – silicone is a good bet if you’re shopping around.

You can omit the blood orange glaze if you want – the cake is delicious on it’s own. But you’d be missing out on a key component in my opinion. If you can’t get blood oranges, regular orange juice will work – or even pink grapefruit if you want to switch it up a bit.
To get that pretty pink color without the blood orange, a drop or two of red food coloring will do the trick.

The dark rum in this low carb blood orange rum cake is also optional but recommended. The alcohol cooks out leaving behind rich caramel notes that perfectly complement the orange in this cake.
If you choose not to use real rum, you can find rum flavored extracts on Amazon or in the spice aisle of your grocery store that don’t contain alcohol but will mimic the flavor. See the recipe for quantities to use if you substitute.

As you can see, the texture of this low carb blood orange rum cake is LEGIT. Seriously. I couldn’t believe how fluffy it was. I really think the blender makes all the difference, though if you don’t have one you can certainly use a mixer.
A superfine almond flour is going to be key to your success here – an almond meal will not give you that same tender and fluffy texture. You can learn more about the products I currently use and recommend for best results over on the IBIH Pantry Page.
I’m always excited for you guys to try a recipe and report back, but this time even more so – I just know you’re going to L.O.V.E. this low carb orange rum cake! So if you make it, please let me know what you think in the comments!!!
Glazed Blood Orange Rum Cake – Low Carb
- Yield: 9 servings 1x
Description
A rich and tender low carb orange rum cake with a delicious blood orange glaze. Super easy, this cake can be made in the blender in minutes. Keto, Atkins, Gluten free.
Ingredients
For the cake:
- 1/2 cup butter, softened
- 3/4 cup granulated erythritol sweetener**
- 3 eggs
- 1 tsp orange extract
- 1 1/2 cups almond flour **
- 1/2 cup coconut flour **
- pinch salt
- 2 tsp baking powder
- 1/4 tsp xanthan gum
- 1 cup vanilla almond milk unsweetened
- 3 Tbsp gold rum (or 1 tsp rum flavoring)
- 1 tsp orange zest
For the glaze:
- 1/2 cup + 1 Tbsp Swerve confectioners
- 1/4 cup fresh blood orange juice (or regular orange juice)
Instructions
For the cake:
- Combine all cake ingredients in a blender. Blend until smooth.
- Grease 9 x 9 cake pan, bundt pan, 8 inch brioche pan or equivalent
- Spoon in batter and spread evenly.
- Bake at 350 degrees (F) for 40 (bundt or 9 x9) to 50 minutes (brioche) or until a knife comes out clean.
- Cool and remove gently from the pan.
For the glaze:
- Combine the glaze ingredients in a small bowl.
- Stir well until smooth and pour over the top.
- Slice and serve.
Notes
**Get more information about the low carb products I use and recommend on the IBIH Pantry Page!
- Category: Low Carb Dessert Recipe
- Cuisine: American
Nutrition
- Serving Size: 1/9 of cake
- Calories: 262
- Fat: 22g
- Carbohydrates: 4g net
- Protein: 7g
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Cami Valenzuela says
This sounds so good. My boys would love this as well. Love that it is low carb as well.
Karen says
Made this and it is mushy, hope it sets up as it cools. Baked it for 50 mins in a bunts pan
Ness says
I am so excited to make this beautiful cake for my daughter’s birthday! I don’t usually have almond milk on hand–do you think soy milk would be okay or might it affect the taste or texture too much? Or maybe cow’s milk?
Amy says
Hi and thanks for all the great recipes. They make managing diabetes sooo much easier, much less insulin!
Anyway, I would love to make this for a dinner party but don’t have xantham gum and am a bit leery of it. Can I replace with pysillium? Something else?
Thank
Amy
Kelly says
I just made it tonight and my cake didn’t rise at all. It was dense like a brownie.
Mellissa Sevigny says
Did you forget the baking powder or is your baking powder old?
adriana says
looks so good.
Maya | Wholesome Yum says
This sounds absolutely delicious! I love how pretty it looks too!
JE Weck says
Made this today. it was quick, easy and delicious. Came out of the pan easy, didn’t break and like you said… tender. I took it to a party put a tag that said gluten free and left it at that. It all went! Thanks for a great recipe.
Sherri Lindsey says
This looks MAGNIFICENT!! Oh my stars, I am going to have a piece of cake and stay fully faithful to my keto WOE!! Thank you so much. <3
Barbara Locasale says
Omg. This is one of the best lc cakes I’ve made in my 6 years low carbing. And it was so easy. I have missed the old rum cake of years past so when I saw this I thought wonder if I could use it for that. Oh yes it worked. I used a bundt pan sprayed with the baking spray and placed chopped pecans in the bottom. I made the cake exactly as written. Poured batter over the nuts and baked exactly 40 minutes. While the cake baked I made my lc rum sauce; butter, sweetener, water, and rum simmered until thickened. Cake came out, cooled 20 minutes, removed from pan, forked the nut topping and poured the glaze on. Thank you, thank you, thank you. I now have my rum cake back.
Mellissa Sevigny says
That’s so awesome to hear Barbara! I love the pecans idea, totally going to try your version!!!