Instant coffee can be found just about everywhere. It's a convenient alternative to regular coffee and it's enjoyed by many looking for a cheap, quick caffeine boost.
Whether you're a fan of instant coffee or someone who has completely shunned it, do you really know what it is? Let's take a closer look at this quick coffee option that has clearly found a place in the world of java, even if mostly for convenience.
What Is Instant Coffee?
Basically, instant coffee is regularly brewed coffee with nearly all the water removed from it. It's a simple process, and no chemical alterations take place. Instant coffee is simply pure coffee without the liquid. One important difference, however, is that instant coffee is usually made with robusta coffee beans rather than the more expensive arabica coffee beans.
Instant Coffee vs. Brewed Coffee
How It's Made
There are two basic methods for producing instant coffee crystals: freeze-drying and spray-drying. Prior to drying, the brewed coffee may—or may not—be concentrated with one of these two methods:
- Vacuum evaporation: A process in which the coffee boils at a lower temperature. It's also used to make ketchup, powdered milk, and other commercial foods.
- Freeze concentration: A more flavor-friendly process in which water-based ice is removed, leaving a more concentrated liquid behind. This procedure is also used to make concentrated fruit juices, applejack, and concentrated vinegars.
The freeze-drying method preserves more coffee flavor, but it's a complicated procedure. You will probably have to pay more for freeze-dried instant coffee, but the superior flavor is worth it.
- The coffee (or a coffee concentrate made by freeze concentration) is rapidly frozen to around -40 F (-40 C).
- It's placed into a drying chamber, a vacuum is created in the chamber, and the chamber is heated.
- As the frozen coffee warms up, the frozen water rapidly expands into gas in a process called sublimation. What's left after sublimation are the dry grains of coffee.
The spray-drying method of making instant coffee is almost as instantaneous as brewing the coffee. The transition from liquid coffee to instant coffee crystals takes only 5 to 30 seconds.
- In this method, coffee or concentrated coffee is sprayed from a high tower in a large hot-air chamber.
- As the droplets fall, the remaining water evaporates.
- And the dry crystals of coffee fall to the bottom of the chamber.
Unfortunately, the high temperatures in this process tend to affect the oils of the coffee, resulting in an additional loss of flavor. Also, it often produces too fine of a powder. In order to make the consistency acceptable for consumers, grains must be fused together with additional processing that involves steam.
Instant coffee was invented in 1890 by New Zealander David Strang. He marketed his instant coffee as "Strang's Coffee" and called his patented instant coffee process the "Dry Hot-Air" process.
But it wasn't until the Pan-American Exposition of 1901 that instant coffee received widespread attention when Satori Kato, a Japanese scientist working in Chicago, introduced it to the masses.
In 1910, English chemist George Constant Louis Washington developed another process for making instant coffee while living in Guatemala. An avid coffee drinker, he noticed a powdery buildup on the spout of his favorite silver coffee pot. That prompted his curiosity and further experimentation followed. He eventually produced a dried coffee crystal much like what we have today. His brand was called "Red E Coffee."
At the urging of the Brazilian government, Nestlé began refining the instant coffee process in 1930. In 1938, the Switzerland-based company introduced its own instant coffee to the international market. They launched the product under the name "Nescafé," a portmanteau of "Nestlé" and "café." In 1965, they expanded their instant coffee offerings to include Nescafé Gold, a freeze-dried instant coffee, in Europe.
Instant coffee is often used on the go and in places where there is not a proper kitchen, such as on trains, at drink kiosks, and in offices. With the advent of single-serve instant coffees, such as Starbucks VIA, drinking coffee on the go is easier than ever.
Did You Know?
Instant coffee is not just a drink. It's also a major ingredient in Caffenol-C, a homemade developing liquid for black-and-white photos. Interestingly, the cheaper the brand of instant coffee, the better it usually works for developing photos.
Looking for instant coffee in your local supermarket? Popular brands include Nescafé, Starbucks VIA, Maxwell House, Folgers, Robert Timms, International Roast, and Kava (a reduced acid instant coffee).
Instant Coffee vs. Espresso Powder
Espresso powder—or instant espresso—is very similar to instant coffee, but it's stronger and is often made from a better quality coffee. It's usually made from darker roasted beans with a higher percentage of Arabica beans in the blend, resulting in a darker, smoother taste. It's also usually dried with the freeze-drying method to preserve flavor.
You can substitute instant coffee for instant espresso in recipes by using 50 percent more than the recipe calls for. But be warned, it may have a harsher taste than it would if you use espresso powder. Adding a little extra sugar can help counteract unwanted bitterness from instant coffee powder.