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Robusta, arabica and blends
Robusta is Coffea canephora; arabica is Coffea arabica. Vietnam grows both. The botanical label describes the plant, not a complete flavor profile or brew recipe. Processing, roast, storage, grind and preparation also shape the cup. Nguyen Coffee Supply identifies its Truegrit as 100% robusta and Loyalty as an arabica–robusta blend; those labels let us compare two real packages without claiming all Vietnamese coffees taste alike.
Published coffee-science reviews report generally higher caffeine in robusta beans by dry mass. That does not turn a species label into milligrams in your cup. Avoid universal claims such as “twice the caffeine” for every serving; use the caffeine guide if dose matters to you.
Choose the package for your experiment
These are whole beans. Both require a grinder for a moka pot or phin. We verified the exact 12-ounce Amazon US variants; a neighboring ground or 5-pound variant has a different ASIN. Neither was tested by us.
Nguyen Coffee Supply Truegrit Robusta whole bean, 12 oz
The selected listing identifies a 100% robusta whole-bean bag. Compare it with a blend using the same pot and serving volume; no tasting or caffeine result is guaranteed.
View Nguyen Coffee Supply Truegrit Robusta whole bean, 12 oz on Amazon →Nguyen Coffee Supply Loyalty Robusta and Arabica whole bean, 12 oz
The selected listing identifies a robusta–arabica blend. It is a useful contrast to a pure robusta bag, not a measured midpoint for caffeine or flavor.
View Nguyen Coffee Supply Loyalty Robusta and Arabica whole bean, 12 oz on Amazon →Compare fairly in a phin or moka pot
- Choose one brewer and keep its normal recipe and the served portion consistent.
- Grind each whole-bean product for that brewer. For a Bialetti Moka Express, follow its medium-fine, gritty starting point and do not tamp the basket.
- Taste each brew black first; add condensed milk only after comparing the base coffee if that is how you usually drink it.
- Write down roast flavor, body and aftertaste in your own words. If a cup is too intense, test a smaller portion or consistent dilution before changing beans.
A phin is the traditional Vietnamese filter; a moka pot is a stovetop pressure brewer. Both can use Vietnamese-grown coffee, but one recipe is not automatically transferable to the other.
Common questions
Is Vietnamese coffee always robusta?
No. Vietnam grows robusta and arabica, and some products blend the two. Read the specific package rather than inferring species from the word Vietnamese.
Does robusta always mean a fixed caffeine dose?
No. Robusta beans generally contain more caffeine by dry weight than arabica in published ranges, but the amount in a cup depends on the coffee, dose, extraction and portion.
Can these whole beans be brewed in a moka pot?
Yes, if ground appropriately. Follow the moka pot maker's water, basket and heat instructions; a phin and a moka pot are different brewers.
Sources and limits
The producer's product FAQ establishes its species labels. A peer-reviewed caffeine review gives ranges rather than a universal drink dose. Bialetti's instructions support the moka brewing advice. Both Amazon US product titles and ASINs were checked September 28, 2026. We did not verify current price, stock, seller, roast date, taste or affiliate attribution.