Leslie Massey
Australia is home to a number of distilleries producing rum, a spirit with a rich history dating back to the 17th-century Caribbean Islands. The process of making rum involves several key steps: harvesting and processing sugarcane or its byproducts, fermentation, distillation, and ageing. The first step in crafting rum is extracting sugar from sugarcane, which is achieved by crushing the canes and adding hot water to produce cane juice. This juice is then fermented with yeast to create an alcoholic base, which can be further distilled to increase purity and alcohol content. Distillers must be cautious during distillation, as the initial output contains harmful substances and an extremely high alcohol content. The distillation process can be adjusted to create variations of rum, such as white rum or dark rum, with the latter being aged in oak barrels to attain a richer flavour. The addition of spices and flavourings can also create spiced rum with unique taste profiles. Australia's distilleries, such as those in Western Australia, showcase their passion for crafting rum by offering behind-the-scenes tours and tastings, providing an insightful experience for enthusiasts and home distillers alike.
| Characteristics | Values |
|---|---|
| Main ingredients | Sugar (sucrose), yeast, and water |
| Sugar source | Sugar cane juice, crushed cane, molasses, or refined sugar |
| Yeast type | Rum turbo yeast or wild yeast from the air |
| Fermentation time | 3-14 days |
| Fermentation vessel | Open-top or closed |
| Distillation type | Continuous or batch |
| Distillation equipment | Pot still or reflux still |
| ABV for ageing | No more than 60% |
| Aging process | In oak barrels or on oak chips/spirals |
| Production location | Australia |
| Water source | Rainwater |
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What You'll Learn
Ingredients: molasses, sugar, yeast, water
To make rum, you will need molasses, sugar, yeast, and water. You can also use ingredients like dunder, yeast nutrient, and flavouring agents, but these four are the most important.
Molasses is a byproduct of the sugar-making process, and it is what gives rum its distinctive flavour. It can be difficult to find food-grade molasses that is safe and affordable, so some people opt for blackstrap molasses, which can be purchased from eBay or Amazon. Blackstrap molasses is often used as horse feed and can be purchased without additives.
Sugar is another important ingredient in rum-making. White sugar is typically used, but brown sugar can also be used if you are willing to pay a premium.
Yeast is a crucial ingredient in rum-making, as it is responsible for fermenting the sugar and molasses mixture. EC-1118 yeast is a common variety used in rum-making and can be purchased online.
Water is the final key ingredient. It is important to use water that is free of contaminants and has a low mineral content, as this can affect the taste of the final product. Rainwater is an excellent option for making rum, as it is soft and free of salts and other harmful elements.
Ingredients:
- 4kg molasses (blackstrap)
- 4kg white sugar
- 2 x 5g packets of EC-1118 yeast
- Water
Equipment:
- 25L fermentation vessel
- Long spoon
- Thermometer
- Kitchen scales
- Kitchen jug
- Glass jars
- Big bucket or demi john
- Pot still
Steps:
- Sterilize your equipment by pouring a few kettles of boiling water into your fermentor.
- Fill your fermenter with about 75% of the total water needed, leaving room for additional sugar if needed.
- Add sugar, molasses, and any other desired ingredients like dunder. Stir until the sugar is completely dissolved.
- Use a hydrometer to check the gravity rating. If it is too low, add more sugar.
- Add the remaining water until the fermenter is filled and the desired gravity rating is reached.
- Once the mixture has cooled to around 25-28°C, add the yeast to the fermenter and seal the container with an airlock.
- Fermentation should begin within a few hours to 24 hours, depending on the amount of yeast used.
- After fermentation is complete (usually 12-15 days), decant the fermented wash to remove solid particles that may burn during distillation.
- Distill the wash in a pot still. Collect the distillate in batches, separating the heads, hearts, and tails.
- The hearts are the desired middle-run product, yielding a light-coloured rum.
- Age the rum in oak barrels or on oak chips/spirals to create a darker, richer-flavoured rum.
Please note that this is a basic recipe and there are many variations and additional steps that can be followed to create different types of rum.
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Fermentation: convert sugars to alcohol
Fermentation is a critical step in the rum-making process, where sugars are converted into alcohol. The wash, a mixture of sugar, yeast, and water, is prepared and cooled before yeast is added to initiate fermentation. This process typically takes 1-2 weeks, resulting in a fermented product called "beer."
The type of sugar used influences the fermentation process. While raw cane sugar wash ferments for 3-7 days, losing its sweetness, molasses-based wash takes 12-14 days and retains a sweet taste. The choice of yeast also matters; some distilleries use specific yeast strains, while others opt for ""wild" yeast from the air.
During fermentation, the wash is placed in a fermentation vessel, and it's crucial to aerate it by transferring it between separate containers. Afterward, it's poured into a fermentation bucket, sealed, and stored in a dark place. The temperature range for storage is essential, typically maintained between 75 °F and 80 °F.
The fermented wash, now called "beer," is then ready for distillation. Distillation aims to separate and collect the ethanol from the beer. This process involves heating the beer to evaporate the alcohol, which is then condensed back into a liquid form. The liquid may undergo additional distillations to enhance purity.
It's important to note that the first 100ml of the distilled product should be discarded as it contains undesirable substances. The subsequent distillate is collected in batches, and the strength and flavour profile vary throughout the process, with the ""heads" being very strong in flavour and the "hearts" being the desired middle-run product.
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Distillation: separate and collect ethanol
Distilling rum is a delicate process that requires careful attention to temperature and the various compounds that evaporate at different stages. The goal is to collect the ethanol, which is safe for consumption, while avoiding methanol, which is harmful and toxic.
Firstly, it is important to note that ethanol boils at 78.4°C. As the temperature rises, you will need to carefully monitor the process. Once the temperature reaches the 82 to 83°C range, shut off the heat source. If you are aiming for a more flavourful rum, you can continue collecting until about 90°C, but be cautious as this is the point where the tails, or the final part of the distillation, start to come off. The tails contain some vegetal off-flavours and should generally be discarded. However, they can be recycled to extract a small amount of additional ethanol for your next batch.
During the distillation process, you will collect the foreshots, heads, hearts, and tails in separate containers. The foreshots contain harmful substances such as acetone, methanol, and other poisonous elements, so they must be discarded. The heads come next and can be included if you desire a stronger flavour. The hearts, which evaporate at 173°F (78.3°C), are the desired fraction that contains ethanol and the desired flavour components.
It is crucial to make precise cuts during distillation to separate these fractions effectively. Using a pot still can help retain more flavour in your rum, but it may require larger quantities for discarding at the beginning, such as 100-200 mL, compared to a reflux still, which requires discarding the initial 50 mL.
By following these steps and paying close attention to temperatures and fractions, you can successfully separate and collect ethanol during the distillation process of making rum.
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Aging: in oak barrels for richer flavour
To make rum, one of the considerations is the ageing technique. White rum does not undergo any ageing process, but if you want a darker rum with a richer flavour, you'll need to age it in oak barrels. Oak barrels have been proven to be the best vessels for ageing potable liquors.
If you're ageing rum, you should be careful which barrel you choose. The flavour of the spirit that was previously used to age the barrel will seep into the rum. For example, if you use a barrel that was previously used to age sherry, the sweetness of the sherry will end up in the rum. The oak barrel will also allow the rum to breathe, so if you plan on ageing the rum for a long time, expect some evaporation. Rum distillers call this evaporation "The Angel's Take".
If you're using a new oak barrel, it's important not to age rum at a higher ABV than 60% as it could spoil the taste. If your rum has a higher ABV than this, you should water it down.
You can also use old oak barrels to age your rum. Many rum producers around the world use ex-whiskey barrels because whiskey producers are required to age their spirit in new oak barrels and, once emptied, they cannot re-fill the barrels. This creates a surplus of barrels that can be used for ageing rum.
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Spiced rum: add spices to taste
Spiced rum is a great way to elevate your cocktails and a fun project to experiment with at home. It's easy to make and can be tailored to your taste. You can use a decent white rum, but a moderately aged, slightly dry spirit can add intrigue to the end product.
To make spiced rum, you'll need to gather your desired mix of spices and other ingredients. You can fill a 16-ounce mason jar with ginger root, star anise, peppercorns, cloves, cinnamon stick, and vanilla extract. Then, fill the jar with rum, cover it, and let it infuse for at least 24 hours. The longer it sits, the stronger it will get. You can also adjust the strength of the spices by letting the mixture sit for a few more days.
After infusing, strain the rum through a fine-mesh strainer into a bowl. Then, decant it back into the jar and seal it. Your spiced rum will keep indefinitely, and you can fine-tune the flavour to your liking.
You can also experiment with different types of rum and spices to create unique flavour profiles. For example, you can add orange peel or use a golden rum for a different colour and flavour. The possibilities are endless, so feel free to get creative and adjust the ingredients to your preference.
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Frequently asked questions
The main ingredients in rum are sugar (sucrose), yeast, and water. The sugar can come from a variety of sources depending on location and availability. Most commonly, molasses is used, but sugar cane juice, crushed cane, or even refined sugar can be be used. Other ingredients may include various spices and essences to add flavor and caramel for color.
You will need a fermentation vessel, a long spoon, yeast nutrient, molasses, white sugar, yeast, a thermometer, kitchen scales, a kitchen jug, glass jars, a big bucket, and a pot still.
First, dissolve the sugar in hot water. The sugar source is added to 50-degree water and stirred to dissolve. It is then left to cool to around 26 degrees Celsius, at which point yeast is added. The wash is fermented for around 1-2 weeks and when ready for distillation is called "beer". The distillation process involves separating and collecting the ethanol from the fermented beer. The beer is heated up until the alcohol evaporates, and this alcohol is collected via a condensation apparatus that cools and condenses the alcohol back into a liquid.
Take your desired mix of spices and other ingredients, put them in a bottle of rum, and let it sit for a couple of days. If you want a stronger flavor, let it sit for a couple more days.
