Keto Rum Cake

by hungryelephant

A delicious keto rum cake! Soaked in a rum syrup, this is the perfect dessert. Only 1.9 net carbs per slice. Totally worth it.

Traditional Caribbean rum cakes usually add in some rum-soaked fruit, which by the way would be delicious, but for keto it would most likely be very high in carbs. So instead, I am making this similar to a ‘butter cake’ that is soaked in a delicious rum syrup (sugar free of course).

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For this delightful dessert, I based it off my keto Kentucky butter cake recipe. It’s super easy and one of my most popular cakes. Instead of adding a ton of sour cream,  I swapped some of it out to add in the rum! Simple!

I also added in a tablespoon of whey isolate, however this is totally optional. I just like that it helps the cake rise just a little bit better than without it.

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As for the rum – you can use any kind but as I’m typing this, I feel like mentioning spiced rum might taste amazing. If anyone uses spiced rum, leave a comment below to let me know how it tastes!

If you like this recipe, make sure to check out my original keto butter cake, keto apple spiced butter cake or my keto gingerbread cake!


Keto Rum Cake
Yield: 12

Keto Rum Cake

Prep Time: 10 minutes
Cook Time: 35 minutes
Total Time: 45 minutes

A delicious keto rum cake! Soaked in a rum syrup, this is the perfect dessert. Only 1.9 net carbs per slice.




  1. For the cake - in a mixing bowl whisk together the eggs, sugar substitute sour cream, melted butter, vanilla and rum.
  2. Pour in the almond flour and baking powder.
  3. Mix thoroughly.
  4. Pour into a greased bundt pan.
  5. Bake at 350°F / 175°C for 35 minutes.
  6. Once cake is done, keep it in the pan and use a skewer to poke several deep holes in it.
  7. In a pot over medium heat, make the syrup - melt the butter together with the rest of the ingredients and cook until the sugar substitute has dissolved.
  8. Pour the syrup onto the cake and swirl it around so that the syrup goes into the holes.
  9. Set aside and let cool.
  10. Take out from the bundt pan and enjoy!


This makes 12 slices.

Nutritional Information Per slice:

  • CALS: 185
  • FAT: 16.6
  • CARBS: 3.4
  • FIBRE: 1.5
  • NET CARBS: 1.9
  • PROTEIN: 4.7

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