Freeze-Dried vs Spray-Dried Instant Coffee: The Honest Truth
Both start as brewed coffee. One dries in seconds in hot air. The other is frozen and dried in a vacuum for hours. Here's what that changes in your cup, and what it doesn't.
Our co-founder, Andrea Giraldo, made her first trip to Colombia's coffee country when she was eight days old. She has spent countless vacations on her family's coffee farms. On a coffee farm, you smell the coffee long before you drink it.
That smell is the first thing instant coffee can lose. How the coffee gets dried decides how much of it makes it into your jar.
We sell freeze-dried coffee, so we have a side. We'll still show you where spray-dried wins.
How instant coffee is made: two methods explained
Every jar of instant coffee starts as real brewed coffee. Here is the basic path from bean to jar:
- Roast and grind the beans.
- Brew a very strong batch of coffee in giant extractors.
- Concentrate the extract. Many makers capture the aroma that escapes here, store it and add it back later (Works in Progress).
- Dry it, by spray-drying or freeze-drying.
- Pack it, often under nitrogen or carbon dioxide, because oxygen dulls the aroma (C&EN).
Steps one through three look about the same at every factory. Step four is where the two kinds of instant coffee split.
Spray-drying: seconds in hot air
The concentrate is sprayed as a fine mist into the top of a tall tower of hot air. That air runs roughly 300 to 570°F (150 to 300°C), depending on the plant (Food and Bioprocess Technology, Works in Progress). The droplets are tiny, around 300 microns (C&EN), and they dry in seconds as they fall. The water flashing off keeps each droplet cooler than the air around it. What lands at the bottom is a fine powder.
Spray-drying is the most common way to make instant coffee (Institute for Scientific Information on Coffee). It's also the older of the two methods. Nestlé used it for the first Nescafé in 1938 (Nestlé).
Most shoppers never see that powder. Makers steam it so the particles stick together into bigger clumps (National Coffee Association). This step is called agglomeration. It's why a lot of spray-dried coffee looks like granules.
Freeze-drying: hours in a cold vacuum
Freeze-drying starts by freezing the concentrate to about -40°F, which is also -40°C (Institute for Scientific Information on Coffee). The frozen slab is broken into granules. The granules go into a vacuum chamber, where the ice turns straight into vapor without ever melting. This is called sublimation. The whole process takes 8 to 16 hours (Works in Progress).
All that time costs money. One industry estimate put freeze-dried production costs 35% higher than spray-drying (C&EN). On the shelf, freeze-dried coffee often sells for about twice the price (Works in Progress).
Maxwell House released the first freeze-dried instant coffee in 1963 (Works in Progress). Nestlé followed with Nescafé Gold Blend in 1965 (Nestlé). Colombia's first freeze-drying plant, Buencafé Liofilizado de Colombia, opened in 1973 in Chinchiná, Caldas (Buencafé).
Freeze-dried vs spray-dried coffee at a glance
| Spray-dried | Freeze-dried | |
|---|---|---|
| How the water comes out | Misted into 300 to 570°F air | Frozen at -40°F, then dried in a vacuum |
| Drying time | Seconds | 8 to 16 hours |
| What it looks like | Fine powder, or rounded clumps if agglomerated | Irregular, flaky, crystal-like chunks |
| Aroma compounds kept (two studies) | 45% to 57% | 73% to 77% |
| Taste | Rounder, heavier body. High-heat versions can taste flat. | Brighter and cleaner, closer to the original brew |
| Dissolving in cold milk | Faster | Slower, so melt it in a little hot water first |
| Foam for a frappé | Thick and lasting | Fades fast |
| Caffeine | Set by the bean and the scoop | Set by the bean and the scoop |
| Typical shelf price | Lower | About twice as much |
| Energy to make | Less | 3 to 5 times more, per one supplier |
Aroma figures come from two studies covered below: Chindapan and Puangngoen, 2024 and Ishwarya and Anandharamakrishnan, 2015. The energy figure is from coffee supplier Sucafina.
What the science says about aroma and flavor
Aroma is where the two methods differ most. Coffee's smell comes from delicate compounds that drift off into the air. Here is what researchers found when they dried the same coffee both ways:
- A 2024 study from Thailand dried one Robusta extract both ways, in a lab and at a working factory. Freeze-dried coffee kept 73% to 76% of the aroma compounds in the concentrate. Spray-dried kept 45% to 50%. That's about 1.5 to 1.6 times more aroma (Burapha Science Journal).
- A 2015 study in the Journal of Food Engineering found freeze-drying kept 77% of the volatile compounds. Spray-drying kept 57% (Ishwarya and Anandharamakrishnan).
- A 2022 study had 20 tasters rate Arabica coffee dried both ways. Freeze-dried scored 46.8 and spray-dried 41.7 on the study's overall quality score (Measurement: Food).
- A 1993 industry trial found freeze-dried coffee had 17% more of the lighter aroma compounds and 75% more of the heavier ones than standard spray-dried coffee. Tasters said regular spray-dried coffee "lacked body and had a caramel and burnt/over-cooked aroma" (Bassoli et al.).
Freeze-drying beat standard spray-drying in all three studies. The one upset came from a special low-heat spray process in the 1993 trial.
Where the gap gets smaller
Spray-drying is gentler than the air temperature makes it sound, since evaporation keeps each droplet cooler than the air. Technique matters too. In that same 1993 trial, a low-temperature spray-drying process kept 69% of the aroma. The freeze-dried sample kept 57%. Tasters said the low-heat version was "very close to the original extract." Newer hybrids look even better in the lab. In the 2015 study, a method called spray-freeze-drying kept 93% of the aroma, beating both.
Aroma add-back also works with both methods. A careful spray-dried coffee can smell better than a careless freeze-dried one.
And freeze-dried coffee has a weak spot. It holds its top notes well while sealed, but once the jar is open, those aromas escape relatively quickly, according to Sucafina. Close the lid after every scoop.
The other variable: the bean
Drying can only keep what the beans brought with them. Freeze-drying can't add sweetness or aroma that was never there.
In our view, the bean matters as much as the method. Food scientists who tested 33 Brazilian instant coffees in 2017 called Robusta "the most usual raw material for instant coffee production" (Beverages). Nescafé says it uses "either Arabica or Robusta coffee beans, or a blend" (Nescafé UK). So check the bean before the drying method.
Caffeine and health: where the drying method barely matters
Caffeine. Neither drying method strips out caffeine. The bean and the size of your scoop decide how much ends up in the cup. Instant coffee averages 62 mg per 8-ounce cup, compared with 96 mg for brewed coffee (Mayo Clinic). Robusta beans carry about 2.7% caffeine, against 1.5% for Arabica (Wikipedia). A cup of our 100% Arabica Regular has roughly 44 to 59 mg of caffeine.
Acrylamide. This compound forms when beans are roasted. In one survey of 42 coffee products, instant coffee averaged 358 µg/kg and roasted ground coffee 179 µg/kg. A cup of instant uses much less powder than brewed coffee uses grounds, so the gap per cup is smaller. The same survey found "no differences in acrylamide" between freeze-dried and agglomerated coffee (PubMed).
Antioxidants. Here the studies disagree. A 2022 lab study found freeze-dried powder kept far more chlorogenic acid, a plant compound linked to coffee's antioxidants (Measurement: Food). A 2017 study from Romania found the opposite: spray-dried powder showed higher antioxidant activity (Studia UBB Chemia). The Brazilian study of 33 instant coffees found "no correlation" between drying method and antioxidant activity (Beverages).
Our take: choose your instant coffee for taste. Neither method has a clear health edge.
Visual and taste differences you'll notice right away
You don't need a lab to tell them apart. Try these five checks:
- Read the label. Freeze-drying costs more, so brands that pay for it often say "freeze-dried" on the jar. In the UK, for example, Nescafé Gold is freeze-dried and Nescafé Original is spray-dried (Nescafé UK). Words like "crystals" or "granules" don't tell you the method.
- Look closely. Plain spray-dried coffee is a fine, even dust. Under a microscope its particles are smooth little spheres (Studia UBB Chemia). Agglomerated spray-dried coffee forms small, rounded clumps. Freeze-dried pieces are irregular, flaky chunks with flat, sharp edges.
- Smell the jar. Open it and breathe in before you add water. The more aroma a coffee kept, the more you'll smell here.
- Taste it black first. Milk and sugar hide the difference. Freeze-dried usually tastes brighter and cleaner. Spray-dried tends to taste rounder and heavier, and cheap ones can taste flat.
- Compare the price per ounce. Freeze-dried coffee costs more to make. A very cheap jar is most likely spray-dried.
When spray-dried is the smarter buy
Spray-dried coffee is the right tool for some jobs:
- A Greek frappé. Spray-dried instant has almost no oil, which lets it hold a thick, lasting foam. Freeze-dried coffee carries more oil, so its foam fades fast (Wikipedia). The frappé was invented in 1957 at a trade fair in Thessaloniki, with Nescafé.
- Stirring straight into cold milk. Spray-dried powder dissolves faster in cold liquid (Sucafina). With freeze-dried coffee, melt it in 2 ounces of hot water first, then pour it over ice.
- 3-in-1 packets and creamy mixes. Sucafina says spray-dried often works better in mixes with milk, sugar, flavors or creamers.
- Hot, humid places. Sucafina says spray-dried coffee resists humidity and temperature swings better.
- A tight budget. Spray-dried jars cost less.
Why Giraldo Farms chose freeze-drying
Our coffee starts as 100% Colombian Arabica from family farms high in the Andes. Our co-founder, Andres Arango, is an agronomic engineer with three decades in coffee. He has given technical help to more than 1,500 coffee farmers.
People buy Arabica for its aroma and sweetness. Our medium roast has a sweet, fruity aroma, good body and lower acidity. Spray-drying would cut our costs. In the studies above, though, standard spray-drying kept about 25% to 40% fewer aroma compounds than freeze-drying. We didn't want to take that chance with coffee from these farms, so we pay more for freeze-drying.
You need nothing but hot water and a spoon. Stir one teaspoon into 6 to 8 ounces of hot water. A 3.52-ounce jar of our Regular Instant Coffee makes about 27 to 35 cups for $9.99. That's roughly 29 to 37 cents a cup. It's Kosher OU certified. Our Organic Instant Coffee is USDA Organic, and our Decaf has 97% to 99% of the caffeine removed with a natural water process. If you like a sweet note, try Vanilla, Hazelnut or Amaretto.
Bottom line: which should you buy?
No instant coffee tastes exactly like a fresh pour-over. A lot of aroma escapes before the coffee is ever dried. In the Thai study, concentrating the brew left just 44% of its aroma compounds. That's why makers try to capture aroma early. Of the two drying methods, freeze-drying keeps more of what's left.
Buy freeze-dried if you drink your coffee black or with a splash of milk, and taste comes first. Buy spray-dried for frappés, 3-in-1 mixes, or when the lowest price per cup matters most.
Either way, look for "100% Arabica" and a named origin on the label.
Frequently asked questions
Is freeze-dried coffee better than spray-dried?
For flavor, usually yes. In two studies, freeze-dried coffee kept 73% to 77% of the aroma compounds measured. Standard spray-dried coffee kept 45% to 57%. Spray-dried is the better pick for frappés, 3-in-1 mixes and tight budgets. The bean matters as much as the method, so look for "100% Arabica" too.
Is freeze-dried coffee as good as regular brewed coffee?
Not quite. All instant coffee loses some aroma before it's dried. Brewed coffee also has more caffeine: about 96 mg per 8 ounces, against 62 mg for instant, according to the Mayo Clinic. Of the two, freeze-dried keeps more of the brew's aroma. You also get a cup in seconds, with no machine to clean.
What is the main drawback of spray-dried instant coffee?
Lost aroma. Standard spray-drying uses air at roughly 300 to 570°F, and two studies found it kept 45% to 57% of the aroma compounds. That can make the coffee taste flat. Tasters in one industry trial also noted a "burnt/over-cooked" smell. In one 1993 trial, though, a low-heat spray process kept more aroma than freeze-drying.
Does freeze-dried coffee have more caffeine?
No. The drying method isn't what sets the caffeine. The bean and your scoop size are. Robusta has about 2.7% caffeine and Arabica about 1.5%, so a Robusta blend can be stronger than a 100% Arabica jar. A cup of Giraldo Farms Regular has roughly 44 to 59 mg.
Is spray-dried coffee bad for you?
We found no research showing spray-dried coffee is worse for you than freeze-dried. Studies disagree on which method keeps more antioxidants. Acrylamide forms during roasting, and one market survey found no difference in it between freeze-dried and agglomerated coffee. Pick the coffee you enjoy drinking.
Is Nescafé freeze-dried?
It depends on the jar. Nescafé UK says its Original and Azera coffees are spray-dried. Its Gold line is freeze-dried, except Gold Espresso and Gold Smooth (Nescafé UK). In the US, Nescafé Taster's Choice Original is sold as freeze-dried (Kroger). Check the label on the exact jar you buy.
Is Starbucks instant coffee freeze-dried?
Starbucks doesn't say. Its Premium Instant lists "instant and microground coffee" as the ingredients (Starbucks). That means very finely ground coffee is mixed in with the soluble coffee. It's a different recipe from plain freeze-dried or spray-dried instant.
What is agglomerated coffee?
Agglomerated coffee is spray-dried powder that has been steamed so the fine particles stick together. The result is larger, rounded clumps that look like granules and dissolve more easily in the cup. It's still spray-dried coffee. Freeze-dried coffee looks flakier and more irregular.
Sources (20)
- Chindapan and Puangngoen, "Comparative Evaluation of Volatile Aroma Compounds Content of Freeze-Dried and Spray-Dried Instant Coffees," Burapha Science Journal, 2024
- Ishwarya and Anandharamakrishnan, "Spray-Freeze-Drying approach for soluble coffee processing and its effect on quality characteristics," Journal of Food Engineering, 2015
- Deotale et al., "Influence of drying techniques on sensory profile and chlorogenic acid content of instant coffee powders," Measurement: Food, 2022
- Bassoli et al., "Instant coffee with natural aroma by spray drying," ASIC 15th Colloquium, 1993
- Marcucci et al., "Antioxidant Activity of Commercial Soluble Coffees," Beverages, 2017
- Ghirişan and Miclăuş, "Comparative Study of Spray-Drying and Freeze-Drying on the Soluble Coffee Properties," Studia UBB Chemia, 2017
- Acrylamide market survey of coffee and coffee substitutes, PubMed 24325083
- Mussatto et al., "Production, Composition, and Application of Coffee and Its Industrial Residues," Food and Bioprocess Technology, 2011
- "What's That Stuff? Instant Coffee," C&EN, 2008
- Stubbing and Sykes, "The creation of instant coffee," Works in Progress, 2026
- Instant coffee, Institute for Scientific Information on Coffee
- Instant coffee, National Coffee Association
- Nescafé at 75, Nestlé USA
- Coffee manufacturing FAQ, Nescafé UK
- About us, Buencafé
- Freeze-dried vs spray-dried: what really changes in the cup, Sucafina, 2025
- Caffeine content table, Mayo Clinic, 2025
- Coffea canephora and Frappé coffee, Wikipedia
- Taster's Choice Freeze Dried Original, Kroger listing
- Premium Instant Medium Roast, Starbucks
