Easy Cold Brew Coffee at Home: Strong Vietnamese Coffee, Ready Overnight
Cold brew does not need a machine, a complicated recipe or even a morning brewing routine. With the right coffee, you can simply add cold water before bed and wake up to a smooth, ready-to-drink coffee the next morning.
The Phinist takes that simple ritual in a distinctly Vietnamese direction: a bold Vietnamese Robusta & Arabica blend, pre-packed into steep bags and finished with a distinctive 48-hour air-infusion process.
Add one 20g cold brew steep bag to approximately 300ml cold water, refrigerate for 10–12 hours, then remove the bag and drink.
No grinder. No machine. No hot water.
And unlike a very light-style cold brew, The Phinist starts with strong Vietnamese Robusta as an important part of the blend, giving the finished drink real coffee body and intensity.
What is cold brew coffee?
Cold brew is coffee extracted slowly in cold or room-temperature water rather than hot water.
The slower extraction generally creates a smoother cup with less perceived harshness than many hot-brewed coffees.
It is also different from iced coffee. Iced coffee is brewed hot and then chilled. Cold brew is brewed cold from the beginning.
How to Make Easy Cold Brew at Home
Drop in one bag
Place one 20g steep bag into a glass, bottle or jar.
Add cold water
Add approximately 300ml cold water and place it in the refrigerator.
Wake up to coffee
After around 10–12 hours, remove the bag and drink straight from the fridge or pour over ice.
Why Vietnamese Robusta changes the cold brew experience
A lot of modern cold brew is built around Arabica and designed to taste delicate, light and subtle.
There is nothing wrong with that style — but it is not the only way cold brew can taste.
Vietnamese Robusta brings something very different: more body, more depth and more obvious coffee intensity.
That matters once coffee becomes cold. Ice and milk can soften flavour, so a stronger coffee base helps the drink remain recognisably coffee rather than becoming thin or washed out.
The Phinist therefore uses a Vietnamese Robusta & Arabica blend: Robusta provides the bold backbone, while Arabica helps bring balance and aromatic lift.
Not flavoured syrup. Air-infused coffee.
The defining feature of The Phinist Cold Brew range happens before you add any water at all.
The Vietnamese coffee is gently air-infused for 48 hours in a controlled environment with food-grade essential oil.
The result is not a syrup added to your glass and not an artificial flavour mixed into a finished drink. The aroma is introduced to the coffee itself before it is packed into the steep bag.
So what does air-infused cold brew actually taste like?
The easiest way to think about it is:
coffee first, aroma second.
The base remains a strong Vietnamese Robusta & Arabica coffee. The air-infusion then adds another aromatic dimension without requiring you to pour flavoured syrup into the finished drink.
With Orange, that means bright citrus sitting over a smooth, chocolatey coffee base.
With Cinnamon, the same strong coffee foundation takes on a warmer, spiced aromatic character.
Orange or Cinnamon?
Cold Brew Orange
Strong Vietnamese coffee gently air-infused over 48 hours with food-grade wild orange essential oil.
Expect a smooth chocolatey coffee base, bright citrus aroma and a refreshing, slightly zesty finish.
No artificial flavours. No added sugar.
20g steep bag • ~300ml cold water • 10–12 hours
Shop Cold Brew Orange
Cold Brew Cinnamon
The same strong Vietnamese coffee base, gently air-infused over 48 hours with food-grade cinnamon essential oil.
The Robusta-led coffee remains bold underneath while cinnamon adds a warm aromatic layer and naturally sweet impression.
No flavoured syrup required.
20g steep bag • ~300ml cold water • 10–12 hours
Shop Cold Brew CinnamonRobusta vs Arabica vs a blend for cold brew
The type of coffee you use changes the finished cold brew significantly.
| Coffee | Typical cold brew character | Best suited to |
|---|---|---|
| 100% Arabica | Lighter body, greater aromatic clarity and often more noticeable fruit character. | Drinkers who prefer a lighter specialty-style cold brew. |
| 100% Robusta | Stronger, fuller-bodied and more intense, often with deeper chocolate and roasted notes. | People who want a bold cold coffee, especially with ice or milk. |
| Robusta + Arabica Blend | Robusta contributes strength and body while Arabica adds balance and aromatic lift. | A versatile cold brew that remains bold but balanced. |
Single-origin cold brew or blend?
Single-origin coffee is useful when the goal is to showcase the specific character of one coffee origin or lot.
A blend has a different purpose: different coffees are brought together deliberately to create a particular balance.
For The Phinist Cold Brew, that balance matters.
The Robusta component gives the drink the strong Vietnamese coffee character we want, while Arabica helps round the cup out.
The air-infusion process then sits on top of that coffee structure rather than replacing it.
Is air-infused coffee the same as flavoured coffee?
Not in the way this product is made.
The Phinist does not ask you to add orange syrup or cinnamon syrup into your finished cold brew.
Instead, the coffee undergoes a controlled 48-hour air-infusion process before packaging.
When you later steep the coffee overnight in plain cold water, both the coffee character and the infused aromatic notes are extracted together.
That is what makes the experience different: the aroma is already part of the coffee ritual before brewing begins.
Can I make it stronger?
Yes.
The recommended starting point is one 20g steep bag with approximately 300ml cold water.
If you prefer an even more concentrated drink, use slightly less water. If you prefer something lighter, dilute the finished brew or add more ice.
Because the blend already contains bold Vietnamese Robusta, you are starting with a stronger coffee foundation than many delicate cold brew styles.
Can I add milk?
Absolutely.
Drink it black to experience the infusion more clearly, serve it over ice, or add fresh milk or oat milk.
The Robusta-led body helps the coffee remain present even after milk is added.
You can also add a little condensed milk if you want a Vietnamese-inspired cold brew with extra richness.
Why cold brew overnight?
Because the easiest morning coffee is the one you already made the night before.
Drop the steep bag into cold water before bed, put it in the fridge and leave the extraction to happen while you sleep.
In the morning, simply remove the bag.
No grinding. No espresso machine. No hot brewing. No waiting for coffee to cool.
One steep bag + approximately 300ml cold water + fridge.
Tomorrow:
Remove the bag and drink.
Strong Vietnamese Robusta character, balanced with Arabica and finished with The Phinist's distinctive 48-hour air-infusion process.
Frequently Asked Questions
How do I make easy cold brew coffee at home?
Place one 20g cold brew steep bag into approximately 300ml cold water and refrigerate for around 10–12 hours. Remove the bag the next morning and serve cold or over ice.
Is Vietnamese Robusta good for cold brew?
Yes. Vietnamese Robusta brings stronger body, deeper coffee flavour and more intensity, which helps the coffee remain noticeable when served cold, over ice or with milk.
Why does The Phinist use Robusta and Arabica together?
Robusta creates the bold Vietnamese coffee backbone while Arabica helps bring balance and aroma. Together they produce a cold brew that is strong without being one-dimensional.
What is air-infused cold brew?
The Phinist's cold brew coffee undergoes a controlled 48-hour air-infusion process with food-grade essential oil before it is packed into steep bags. This introduces Orange or Cinnamon aroma into the coffee before brewing.
Does The Phinist Cold Brew use flavoured syrup?
No syrup is required. The aromatic character is introduced through the coffee's air-infusion process before brewing. The Orange product also contains no artificial flavours and no added sugar.
How long is the coffee air-infused?
The coffee is gently air-infused for 48 hours in a controlled environment before being packed into ready-to-brew steep bags.
Can I make cold brew without a coffee machine?
Yes. A steep bag requires no coffee machine or grinder. Simply add cold water, refrigerate overnight and remove the bag when brewing is complete.
Can I add milk or juice to cold brew?
Yes. The strong Vietnamese Robusta component gives the blend enough body to work well black, over ice, pair with juice or with milk.
Strong Vietnamese coffee. Air-infused before you brew.
Vietnamese Robusta & Arabica. A distinctive 48-hour air-infusion process. One steep bag. Cold water. Ready by morning.
Discover Cold Brew Orange