Creamy with a natural mild sweetness, Amazake or sweet sake is a popular Japanese hot drink during the New Year’s and Hina Matsuri (Doll Festival). In this post, you will see two ways to make Amazake: one with rice koji and the other one with sake lees.
When I was younger, I always associated amazake (甘酒) with the taste of alcoholic sake. It was that distinct aroma of sake in the drink that gave me the impression that it would be too strong, so I would always pass on the drink when someone offered it. I didn’t know there was a non-alcoholic version then.
What is Amazake?
Amazake (pronounced ah-mah-ZAH-kay) is a traditional Japanese drink made of fermented rice. Literally means “sweet” (甘) “sake” (酒), it has a creamy, thick consistency with a sweet flavor, served either chilled or warm/hot. Although it is commonly called the sweet sake, Amazake can be made either low-alcohol or non-alcohol.
The history of amazake goes back to the Kofun period (250 to 538 AD), mentioned in The Nihon Shoki (日本書紀) or The Chronicles of Japan – the second-oldest book of classical Japanese history.
There are 2 Types of Amazake. Alcoholic amazake made with sake lee (the one I didn’t like growing up), and the non-alcoholic amazake made with rice koji. I now enjoy both types of amazake and they have been my favorite winter comfort drink for many years.
By the way, if you are familiar with Korean sweet rice drink (sikhye) that is served complimentary at the end of a meal at a Korean restaurant, you may think amazake is the same drink. It is not. Amazake is made with rice, water, and sake lees (酒粕) or rice koji (米麹), while sikhye is made of malted barley flour, rice, sugar, and water.
Non-Alcoholic Amazake Made with Rice Koji
- Non-alcoholic; can be enjoyed by everyone including small children and pregnant ladies
- Made with rice, rice koji, and water
- Can be time-consuming to make
- Temperature control is very important
Rice koji (kome koji 米麹) is rice that is covered with kōji mold (Aspergillus oryzae). As you may already know, kōji mold is used in making many Japanese fermented foods such as miso, soy sauce, mirin, and sake. It helps create some of the most important Japanese ingredients, and maybe one of the contributing reasons to Japanese longevity!
You can buy rice koji (including one above from Cold Mountain) at Japanese grocery stores (refrigerated section near miso), or Amazon.
To make amazake, ferment the rice with rice koji at 125-140 ºF (50-60 ºC) for 8 to 10 hours. This particular temperature range is the most suitable temperature for the enzyme to break down the starch into glucose/sugar.
Low-Alcohol Amazake Made with Sake Lees
- Alcoholic (8%)
- Made with sake lees, sugar, and water
- Easy method
Amazake made with lees left from sake production (sakekasu 酒粕) is a low-alcoholic drink (8% alcohol). Sake lees are dissolved in hot water and sugar is added in to sweeten the lees.
Benefits of Drinking Amazake Made with Rice Koji
Amazake made with rice koji has more nutritional value than the one made with sake lees, and it’s called the “IV drip to drink”「飲む点滴」in Japan.
This fermented rice drink is packed with nutrients, including vitamin B1, vitamin B2, vitamin B6, folic acid, ferulic acid, dietary fiber, glutamine, and a large amount of glucose – which are almost the same components as an IV drip, hence the catchy nickname for amazake.
Benefits of drinking amazake:
- improved skin (prevent spots and freckles, skin lightening, moisturizing)
- increased metabolism
- fatigue recovery
- improved digestion
- strengthened immune system
Even though amazake is good for you, it is important to enjoy the sweet drink in moderation, especially if you’re diabetic. Just one cup (200-250 ml) of amazake in a day is enough to provide you these health benefits.
Tips to Make Amazake at Home
Amazake with Rice Koji
- Temperature control is the key! You need to maintain the rice and rice koji mixture between 125 and 140 ºF (50-60 ºC) at all times (8 to 10 hours).
- If the temperature is too high, the enzyme of koji does not work sufficiently and won’t become sweet. Conversely, if the temperature is too low, the fermentation of lactic acid progresses too much and the bacteria propagate, causing the drink to become too sour.
- Use whatever device you like (a rice cooker, yogurt maker, thermos pot/jar, etc). To me, the rice cooker is the easiest option. Instant Pot Ultra has a “custom” temperature setting in the yogurt function so you can set the temperature to 125-140 ºF (50-60 ºC) throughout.
Amazake with Sake Lees
- Let the sake lees softened first and dissolved completely.
- Adjust the amount of sugar according to your preference.
- Get sake lees at Japanese grocery stores or sale manufacture (usually they give it for free!).
Drinking Amazake in Japan
If you have traveled to Japan before, you might have had a chance to try complimentary amazake at your ryokan, or even some souvenir shops. It is a popular drink served during New Year’s in Japan as well. Many temples and shrines provide it free of charge to worshippers on New Year’s Day and sell it for visitors to bring home.
Amazake is also served during Hina Matsuri (Doll Festival) held on March 3rd every year, as a non-alcoholic option to shirozake (白酒) – a sweet white sake with less alcohol, which is traditionally served on this day.
Amazake is the perfect winter drink. It’s healthy, comforting, sweet & creamy! Just what you need to keep warm and cozy until springtime.
Japanese Ingredient Substitution: If you want to look for substitutes for Japanese condiments and ingredients, click here.
Amazake with Rice Koji
Amazake with Sake Lees (Sake Kasu)
- 4 cups water
- ½ cup sake lees (sake kasu) (4.2 oz; packed tightly)
- ⅓ cup sugar (2.5 oz, 6 Tbsp)
- pinch kosher/sea salt (I use Diamond Crystal; use half for table salt) (to taste)
★ To Cook Amazake with Rice Koji
- In a rice cooker bowl, add the rinsed short-grain rice. Add water until the 1 cup porridge water line. If there is no porridge water line, add water to the regular white rice 4 cup line. Cook the porridge according to your rice cooker’s instructions (or Press “Porridge”).
- Once the porridge is cooked, the temperature is around 175ºF (79ºC). Take out the bowl from the rice cooker.
- Gradually add water, ⅛ cup at a time, stir thoroughly, and measure the temperature of the porridge. The temperature has to cool down to 140ºF (60ºC) as koji mold cannot live above that temperature.
- Once the porridge has reached 140ºF (60ºC), add the crumbled rice koji. Stir thoroughly to incorporate. Make sure there is enough water to cover the rice and rice koji so they are sufficiently soaked. If not, add warm water so it maintains 140ºF (60ºC).
- Put the rice cooker bowl back into the rice cooker. Turn the rice cooker on to “keep warm” (or "extended keep warm") setting and cover with a cloth towel. Leave the rice cooker lid fully open so it does not get too hot. Allow the rice to cook for 8-10 hours, stirring occasionally and checking the temperature of the mixture every hour for the first 2-3 hours. Make sure it stays between 125 and 140ºF (50-60ºC) at ALL TIMES.
- Toward the end of 8 hours, the mixture starts to release the sweet fragrance. Once it’s done cooking, the mixture should smell sweet. Turn off the rice cooker and transfer the rice cooker bowl into ice water to let cool and stop cooking. When it’s cooled, transfer the amazake into a large sterilized container.
- Take out the portion you need, dilute the mixture with (hot/iced) water to the consistency you like (I like mine without diluting), and serve hot (reheat) or chilled. You can serve with grated ginger. My kids love smoothies made with amazake, banana, and soymilk. If you heat amazake above 140ºF (60ºC), the enzyme will die, so if you like to heat up, enjoy lukewarm in order to obtain the enzyme.
★ To Make Amazake with Sake Lees (Sake Kasu)
- Gather all the ingredients. Tear the sake lees into small pieces.
- Bring 4 cups water to a boil in a large pot. Using a sieve, dissolve the sake lees into the water. It may take some time to do this step, but you don’t want to drink the chunk of sake lees so let them soften first, which will be easier to dissolve.
- Once all dissolved, add sugar and salt. Let it cook until the preferred consistency. I reduce the amazake by cooking for 15 minutes or so to achieve a slightly thicker consistency. Serve hot/warm and enjoy!
- You can keep in the refrigerator up to one week, or in the freezer for up to a month.
Other Japanese Drinks You May Enjoy
- Plum Wine (Umeshu)
- Buckwheat Tea (Sobacha)
- Japanese Cream Soda
- How to Make Matcha (Japanese Green Tea)
- Japanese Iced Coffee
Editor’s Note: This post was originally published on January 8, 2018. The post has been edited in February 2020.