Medical Video: Science of Coffee: Hot vs. Cold Brewed Coffee
All the eyes and tongues of coffee connoisseurs in Indonesia lately are focused on the cold brew coffee trend. Indeed, sipping a glass of cold coffee in a hot afternoon is much more refreshing than a cup of hot coffee. But is this new trend indeed healthier than ordinary brewed coffee, as people say? (Psstt ... Don't rush to close this article if you want to know how to make cold brew coffee yourself at home!)
What is cold brew coffee?
Simply put, cold brew is a technique of "brewing" black coffee powder with cold water (or room temperature water) for approximately 12-24 hours to get an optimal taste.
You can "brew" your choice of coffee powder by soaking it in a glass and leaving it to the surface and filtering it, or using a special coffee brewer, such as french press or cold drip.
This cold brewing technique will produce concentrated coffee concentrate. This coffee concentrate can be drunk directly as black coffee without further ado, or added milk, cream, sugar, or other sweeteners to mix other coffee creations. For example, cappuccino.
Cold brew coffee concentrates can stay fresh for up to two weeks if you keep them in the refrigerator.
What is the difference between cold brew coffee and ice coffee?
Although the name contains the word "cold", cold brew coffee is different from regular ice coffee. Making a glass of iced coffee takes more time than "brewing" cold brew coffee. Ice coffee mixed with coffee powder dissolved using hot water and added ice cubes afterwards to cool. Cold brew coffee concentrate is obtained from soaking black coffee powder with cold water or room temperature water.
Different techniques produce different feelings.Hot espresso which is used as the basis of coffee ice must be processed more strongly so that the flavor and aroma are not easily fade after being diluted with ice. This method of steeping hot water gives black coffee (both hot and added to ice) the taste and aroma strong bittertypical coffee in general.
Meanwhile, cold brew takes up to 18-24 hours to produce concentrate. This process similar to infused water produces smoother taste and aroma. This is what causes coffee cold brew tastes sweeter. You can also serve this cold-cold concentrate with ice cubes without having to be afraid of being found to taste too fresh because of dilution. For this reason, making coffee using the cold brew method is generally considered the best method for preparing cold coffee.
Which healthier, regular black coffee or cold brew coffee?
Broiled coffee, espresso, or cold brew coffee are basically ordinary black coffee. What is different is only the manufacturing technique. Therefore, both a cup of traditional black coffee and a cup of cold brew concentrate can be said to be almost zero calories and have no significant nutritional value. A cup of black coffee and cold brew coffee concentrate served without sugar together do not contain carbohydrates, fats, proteins, and other important macronutrients, such as calcium and fiber. The nutritional value of all versions of this drink has just changed when added flavorings or sweeteners.
In addition, the taste of cold brew coffee is not as traditional as conventional coffee. Coffee that is "brewed" using cold water has a pH level of 6.31, as opposed to the hot version containing pH 5.48 - on the pH scale, the lower the number the more acidic the substance is.This means cold brew coffee can be a safer choice for satisfying the desire for coffee for people who have digestive problems, such as stomach ulcers or acid reflux, explains Joan Salge Blake, RD, clinical associate associate at Boston University and author of Nutrition & You, reported from Health.
In addition, foods / beverages that are low in acid have been linked to a variety of health benefits, such as supporting bone health, reducing loss of muscle mass, maintaining heart and memory health, to reducing the severity or incidence of hypertension and stroke, according to an article in the Journal of Environmental and Public Health.
Cold brew coffee is also lower in caffeine than black coffee brewed with hot water. One cup of black coffee mixed with hot water contains about 62 milligrams of caffeine, while caffeine in cold brew coffee concentrates is generally only around 40 milligrams.
Tips for making cold brew coffee at home
Tempted by the amount of goodness of cold brew coffee above? You don't have to bother going out of the house to buy a lot if you have the ingredients at home and know how to make it. Following are the steps:
What you need:
- Wooden spoons or spatulas
- Black coffee powder, can be Arabica or Robusta
- Coffee filters, clean thin fabrics, or large filters
- Glass jars or large sealed containers
- Big bowl
- Cold water
How to make:
- Pour the coffee powder into the chosen container, then follow it with cold water. The best comparison is 1: 8 coffee and water.
- Stir until the coffee is well blended. Close the coffee container tightly, leave it for 18-24 hours (may be at room temperature or in the refrigerator).
- After time, strain the coffee with a sieve into a large bowl. Repeat the filtering up to 2-3 times until the color of the clear coffee concentrate without coffee powder pulp is left behind.
- Serve it. You can add ice, cream, milk or sugar to your taste. Keep the rest in the refrigerator. If stored properly, cold brew coffee can last up to 2 weeks to a month.