Rum Old Fashioned Cocktail Recipe

This rum old fashioned cocktail recipe is really simple but still feels fancy. We mix dark rum with Demerara syrup and aromatic bitters. These ingredients come together to create the perfect balance of sweetness and spice. It’s a fresh take on the Old Fashioned that’s been loved for generations.

This cocktail works for everyone. If you’re new to mixing drinks, it’s easy to make, but it still has that wow factor for anyone who knows their way around a bar. Whether you’re making it for yourself or to impress friends, this drink is a winner. So grab your ingredients and let’s shake up something special!

Ingredients You'll Need

Let’s talk about what you’ll need to make the perfect rum old fashioned. Every ingredient has its own job in creating that rich, balanced flavor we all love.

Aged Rum

We love using aged rum for this drink. It has a rich, smooth character that really shines here.

The time it spends in oak barrels gives it flavors like caramel, vanilla, and a hint of spice. It has a complexity that reminds us of whiskey but with its own tropical twist.

For the best results, go for a rum that has been aged at least five years. It will give you that perfect blend of warmth and depth that makes every sip special.

Demerara Syrup

Demerara syrup is what we always reach for to sweeten this cocktail. It is made from cane sugar, so it has a richer, deeper flavor than regular sugar.

The best part? It is super easy to make at home. Just mix equal parts Demerara sugar and hot water, stir until it dissolves, and let it cool. You can keep it in the fridge for about a month. It is a small step that makes a big difference.

Aromatic Bitters

Bitters are like the secret ingredient that ties the whole drink together. They add just the right amount of depth and balance.

We usually go with Angostura bitters because their blend of herbs and spices works so well with rum. If we feel like switching things up, we might add a dash of orange bitters for a little brightness.

Start with a couple of dashes and see how it tastes. You can always add a bit more if you want, but a little goes a long way.

How to Make a Rum Old Fashioned Cocktail

Let’s make a rum old fashioned together. You do not need a fancy bar setup to get started. If you have some essential bar tools, that’s great, but even a large glass and a long spoon will do the job just fine.

First, we’ll start by adding a few dashes of bitters and a teaspoon of Demerara syrup to the mixing glass. This is where all that rich, complex flavor begins. Next, we’ll pour in 2 ounces of dark rum. The deep, smooth flavor of the rum pairs beautifully with the bitters and syrup, giving this drink its signature taste.

Now it is time to add ice to the mixing glass and give it a good stir. About 30 seconds should do it. This chills the drink and adds just the right amount of dilution for a perfectly balanced sip. Once that is done, we’ll strain the cocktail into an Old Fashioned glass over one large ice cube. The big cube keeps it cold without watering it down too quickly.

For the finishing touch, we’ll add an orange peel. Give it a twist over the glass to release those amazing citrusy oils, then drop it in as your garnish. And just like that, you have a rum old fashioned that’s as fun to make as it is to drink.

Check out the recipe card below for the full list of ingredients and measurements. Cheers to your homemade Rum Old Fashioned!

Rum Old Fashioned Recipe Variations

Let’s mix things up with some fun takes on the rum old fashioned. These ideas are perfect if you’re ready to try something new.

For a cozy twist, swap aged rum for spiced rum to make a Spiced Rum Old Fashioned. It’s warm, aromatic, and great for cool evenings.

If tropical flavors are more your style, go for a Coconut Rum Old Fashioned. Use coconut rum and garnish with a lime wheel for a drink that feels like a mini vacation.

Maple syrup lovers will enjoy the Maple Rum Old Fashioned. Just replace Demerara syrup with maple syrup for a rich, comforting flavor that pairs perfectly with rum.

For a non-alcoholic version, use rum-flavored syrup and aromatic bitters. It’s a great option so everyone can enjoy a rum old fashioned.

Get creative and play around with different rums, syrups, and bitters. The best cocktails come from experimenting and having fun. Cheers!

Other Cocktails You Might Enjoy Next

If you’ve mastered the rum old fashioned, why stop there? Here are a few other drinks we think you’ll love:

• Whiskey Old Fashioned
• Mezcal Old Fashioned
• Daiquiri
• Boulevardier
• Mai Tai
• Dark 'n' Stormy

Looking for even more rum inspiration? Check out our guides on easy white rum cocktails, dark rum drinks, two-ingredient rum cocktails, and the classic Rum Sour. Cheers to your next cocktail!

Frequently Asked Questions

What's the difference between a classic Old Fashioned and a Rum Old Fashioned?

The main difference lies in the base spirit. Classic Old Fashioneds use whiskey, while Rum Old Fashioneds feature dark rum. This swap changes the flavor profile quite a bit.

Whiskey brings woody and spicy notes. Rum adds sweetness and tropical hints. Both drinks follow the same basic recipe, but the rum version often has a softer taste.

What is the origin of the Rum Old Fashioned cocktail?

The Old Fashioned dates back to the early 1800s. It started as a simple mix of spirit, sugar, water, and bitters.

The Rum Old Fashioned came later. It likely grew from rum's popularity in the Caribbean and Latin America. While we can't pinpoint its exact birth, it shows how classic drinks adapt to local tastes.

What does a Rum Old Fashioned taste like?

A Rum Old Fashioned blends sweet and bitter flavors. The rum adds notes of vanilla and caramel, while bitters bring complexity.

You'll taste hints of spice from the rum. An orange peel garnish adds a citrusy aroma. The result is a balanced, satisfying sip that's both familiar and unique.

How strong is a Rum Old Fashioned?

Rum Old Fashioneds pack a punch. They typically contain about 25-30% alcohol by volume. That's less than straight rum, but still pretty strong.

A standard serving uses one to two ounces of rum. Ice dilutes the drink a bit as it melts. This softens the alcohol bite while bringing out more flavors.

What's the best rum for a Rum Old Fashioned?

We recommend using aged dark rums for Rum Old Fashioneds. These rums offer complex flavors that shine in the cocktail.

Look for rums with notes of oak, vanilla, and spice. Brands known for quality aged rums work well. Try a few different options to find your favorite.

Can I use white rum instead of dark rum in a Rum Old Fashioned?

Yes, you can use white rum, but it will change the drink. White rum gives a lighter flavor than dark rum.

If you use white rum, try adding extra bitters or spices. This can help build back some complexity. Remember, cocktails are flexible. Feel free to experiment and make it your own.

Rum Old Fashioned Cocktail Recipe

We’re big fans of classic cocktails with a little twist, and the rum old fashioned is one of our favorites. It puts a tropical spin on the timeless drink, making it perfect for those warm evenings or whenever you’re in the mood for something smooth and flavorful.

Print Recipe Pin Recipe

Prep Time 5 minutes mins

Total Time 5 minutes mins

Course Cocktails, Drinks

Servings 1

Equipment

• Mixing Glass
• Bar Spoon
• Jigger
• Strainer
• Old Fashioned glass or rocks glass

Ingredients

  

• 2 oz dark rum
• 1/4 oz Demerara syrup or 1 tsp granulated sugar
• 2 dashes Angostura bitters
• 1 dash orange bitters optional
• Orange peel for garnish

Instructions

 

• Start by adding your rum, Demerara syrup, and bitters to the mixing glass.
• Fill the glass about 2/3 full with ice.
• Stir everything for about 30 seconds until the drink is nicely chilled.
• Strain it into an old fashioned glass over a large ice cube.
• Twist an orange peel over the glass to release its oils, then drop it in as your garnish.

Notes

• No Demerara syrup? Use simple syrup or muddle a sugar cube with the bitters. You can also try something fun like maple syrup or honey for a unique twist.
• Feel like experimenting? Try bitters like chocolate or cardamom for a different flavor. Just a dash will do as it is easy to go overboard.
• Start with less syrup and adjust as you go. It is easier to add more than to try to fix a drink that’s too sweet.
• Use the best rum you can. With a simple cocktail like this, the quality of the rum makes all the difference.

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