Hot Buttered Rum – How to make Christmas in a Cup!

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This Hot Buttered Rum recipe will keep your carbs count in check as well as warm you from the inside out…

Hot buttered rum is traditionally a seasonal drink but it’s delicious all winter long. We live in the high Rocky Mountains so warm drinks are sort of a “thing” here.

The butter mixture is also excellent in coffee for a special low carb treat.

Low Carb Hot Buttered Rum Post

This is a super easy recipe so I’ll keep it short and sweet…


  • Water.
  • Butter – unsalted
  • Cinnamon
  • Rum.

How to make Hot Buttered Rum:

  • Put everything but the rum in a medium size saucepan and bring to a boil.

Then turn down the heat and let simmer for 10-15 minutes.

  • Turn off the heat and stir in the rum.

High heat will evaporate alcohol. Make sure it is no longer boiling when you add the booze.

  • Garnish with a cinnamon stick, and serve hot.

Tips & FAQ’s:

Can I make this ahead of time?

Sure, follow the instructions up to the part where you add the rum.

Once you add the alcohol it cannot be re-heated. Cut the recipe in half if you won’t be able to finish it all.

Can I add more alcohol?

Sure. Our recipes are guides, you’re the boss. Add as much of whatever as you like.

Obligatory message: Indulge in alcohol responsibly.

Alcohol affects low carb dieters differently. You might find yourself tipsy faster than you’re used to.

Check out this post on Ketosis and alcohol to know what to expect.

Do you have any other Christmas type recipes?

So glad you asked lol. Check out this big round up of 99 Fantastical Low Carb Holiday Recipes!

That’s It for the Low Carb Hot Buttered Rum Recipe!

This recipe is traditionally chock full of sugar and would never even be considered by someone who’s living the low carb lifestyle.

But I have discovered that with a few tweaks you can replicate just about any recipe you want.

I gave up drinking alcohol some time ago but Thom likes to indulge every once in a while.

He seeks out new and exciting versions of his favorite drinks and hot buttered rum is definitely one of them.

I think it’s important to not feel like you are missing out when you are heading down a new healthier lifestyle path. Check out these five fantastic cocktails once you make your Hot Buttered Rum.

Looking for more Keto Inspiration for the holidays?

As a recipe developer and creator I am always looking to help my readers find the best recipes. My friends over at have some of the best easy, healthy and delicious Keto Christmas recipe ideas to help make your holidays bright. Check them out!

Ta ta for now friends!


Hot Buttered Rum Recipe Keto Low Carb Gluten free

Hot Buttered Rum

Thom Collins
Ahh, Hot Buttered Rum – Let the weather outside be as frightful as it wants.  This will warm you to the core. And, it will do it with no carbs.
4.73 from 22 votes
Prep Time 5 minutes
Cook Time 15 minutes
Total Time 20 minutes
Course Cocktails
Cuisine American
Servings 6 people
Calories 162 kcal


  • 2 cups water.
  • ¼ cup butter unsalted 4 tbsp
  • ¼ cup Allulose or sweetener of choice.
  • 1 tsp ground cinnamon
  • ¼ tsp ground nutmeg
  • salt to taste
  • 1 cup rum.


  • Put everything but the rum in a medium size saucepan and bring to a boil. Then turn down the heat and let simmer for 10-15 minutes.
    Sauce pan
  • Turn off the heat and stir in the rum. 
  • Garnish with a cinnamon stick, and serve hot. 
    hot buttered rum roundup


Notes:  Almost no carbs.
Add more rum if you would like, but be responsible.


Serving: 4ozCalories: 162kcalCarbohydrates: 1gProtein: 1gFat: 8gSodium: 5mgFiber: 1gFat Ratio per Serving: 44.44%Protein Ratio per Serving: 2.47%
Keyword gluten free
Tried this recipe?Mention @ketocastleinthemountains or tag #ketocastleinthemountains!

The nutritional information for the Low Carb Hot Buttered Rum Recipe is provided as a courtesy.

We are pretty careful about our figures but if you ever feel like anything is off please feel free to do your own calculations.

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Recipe Rating


  1. Claudio, Thanks. Low carb food will NEVER taste exactly the same as sugary treats. Concentrate on what you CAN have and it will be easier to stay Keto and meet your goals.

  2. 4 stars
    This recipe made my day. I am still new to Keto and the “sweetener” is taking time to get used to or else it would be a five star recipe.

  3. I have been looking for recipes to make for the holidays and I cant wait to make this! After a year and a half without seeing my family, I am taking a lot more care with this years menu. Thank you for your recipes! I really appreciate you guys.

  4. 5 stars
    This Hot Buttered Rum really does taste like Christmas in a cup! Thanks so much for helping to make this season a little brighter.

  5. Hi Mary! I am so glad you are going to make this drink. It’s a fantastic way to warm up. I think that your idea will work. Just make sure you keep the drink under 172F or the alcohol will evaporate. You’ll still have the flavor of the rum but not any of the effects…which is an important part of the experience for most people lol.Cheers!

  6. TY so much for this fabulous idea! I’m in the Rockies of Canada and totally ‘get’ the indulgence of hot, winter drinks, especially toward the holidays! ❤️

    Do you think after swimming, that putting that mixture into a small crockpot and then adding the rum, keeping it on low, would be a good idea too? I think I may give that a try…so I don’t forget it’s on the stove and that it can stay perpetually warm (on low). TY so much again! 🙂

  7. I needed a recipe for one drink and didn’t have some of these ingredients on hand. But, you inspired me! I heated 1/2 cup of spiced rum with 1 Tblsp of salted butter and 1 Tsp of Pumpkin Spice in the microwave for 30 seconds. Added 1 cup of boiling hot water. Stirred and enjoyed. Thanks for the idea!