How to Make Iced Coffee at Home (3 Easy Ways)

The short answer

There are three easy ways to make iced coffee at home, and none of them need a machine:

1. Flash brew (fastest and best): brew hot coffee straight over ice so it chills instantly while keeping all its aroma.
2. Chill and pour: brew coffee, cool it in the fridge, then serve over ice.
3. Cold brew: steep coarse grounds in cold water overnight for a smooth, low-acid concentrate.

The one rule that ties them together: brew it stronger than usual, because the ice will melt and dilute your cup. Below is how to do each, plus an iced latte and a few ways to keep it from tasting watery.

Method 1: Flash brew (our favourite)

Flash brew, sometimes called Japanese-style iced coffee, means brewing hot coffee directly onto ice. You get the bright, aromatic flavour of a fresh hot brew, chilled in seconds. It is ready in about three minutes with no overnight wait, which is why it is the specialty-coffee way to do iced.

It is also where a drip bag shines, because the coffee is already measured and ground for you.

With a KNDZ drip bag

1. Fill a tall glass about two-thirds with ice.
2. Open the drip bag and hang it on the rim of the glass, so it sits over the ice.
3. Pour a little hot water (just off the boil, around 90 to 96°C) to wet the grounds and let them bloom for 30 seconds.
4. Pour the rest of the hot water through slowly, in stages. Use roughly half the water you normally would (about 100 to 120 ml), since the melting ice makes up the rest.
5. Lift out the bag, give it a stir, and top with more ice if needed.

Because the hot coffee hits the ice immediately, it locks in aromatics that a slowly cooled coffee can lose. If you want to understand the numbers behind the ratio, see our pour-over coffee ratio guide.

Method 2: Chill and pour (best for batches)

The simplest make-ahead method. Brew coffee as normal but a little stronger, let it cool to room temperature, then keep it in a sealed jar in the fridge. When you want a cup, pour it over ice and add milk or sweetener.

Great for mornings when you want iced coffee ready to go. It will keep well in the fridge for two to three days. Avoid pouring piping-hot coffee straight over ice for storage, as it melts the ice and waters things down.

Method 3: Cold brew (smoothest, lowest acid)

Cold brew is not the same as iced coffee. Instead of brewing with heat, you steep coffee in cold water for a long time, which makes a smooth, naturally sweet, low-acid concentrate.

1. Combine coarse-ground coffee and cold water at about a 1:4 to 1:5 ratio (for example 100 g coffee to 400 to 500 ml water) in a jar.
2. Stir, cover, and leave it in the fridge for 16 to 24 hours.
3. Strain through a paper filter or fine sieve to remove the grounds.
4. Serve the concentrate over ice, diluted with water or milk to taste (start at half concentrate, half water).

Cold brew keeps in the fridge for up to a week, so it is worth making a batch. It needs coarse grounds, so it suits ground coffee rather than a single drip bag.

Iced latte and milk coffee

To turn any of the above into an iced latte or a creamy milk coffee:

1. Fill a glass with ice.
2. Add cold milk (dairy or oat both work well), filling about two-thirds.
3. Pour your flash-brewed coffee or cold brew concentrate over the top.
4. Sweeten if you like, then stir.

For a cafe-style finish, shake the coffee, milk and a little sweetener with ice in a sealed jar for 15 seconds to make it frothy before pouring.

How to stop iced coffee tasting watery

• Brew stronger. Use less water for the same amount of coffee, so it can survive the ice melting.
• Make coffee ice cubes. Freeze leftover coffee in an ice tray and use those instead of water ice. As they melt, they add coffee, not water.
• Chill before you pour when making it ahead, rather than pouring hot coffee over ice to cool it.
• Use plenty of ice. Counterintuitively, more ice melts slower than a little, so your drink stays cold and strong for longer.

Which method should you pick?

• Want one cup, right now? Flash brew with a drip bag.
• Want a jug ready for the week? Chill and pour, or cold brew.
• Sensitive to acidity? Cold brew is the smoothest and gentlest.

Whichever you choose, it starts with good coffee. KNDZ is 100% Arabica, roasted in small batches in Toronto, and our single-serve drip bags make flash-brewed iced coffee about as easy as it gets.

Shop KNDZ drip bag coffee →

Frequently asked questions

Is iced coffee just hot coffee with ice?

More or less, but the trick is to brew it stronger so the melting ice does not dilute it, and to chill it quickly. Flash brewing (pouring hot coffee straight over ice) keeps the flavour bright, while pouring warm coffee over ice to cool it slowly can taste weak.

Can you make iced coffee from regular hot coffee?

Yes. Either brew it straight over a glass of ice (flash brew), or brew it, chill it in the fridge, and pour it over ice later. Brew a little stronger than usual so it holds up once the ice melts.

How do I make iced coffee without a machine?

A drip bag is the easiest way: hang it on a glass of ice, pour hot water through, and you have fresh iced coffee in a few minutes. No machine, grinder or scale needed.

How do I make an iced latte?

Fill a glass with ice, add cold milk to about two-thirds, then pour flash-brewed coffee or cold brew concentrate over the top and stir. Sweeten to taste, or shake with ice for a frothy, cafe-style finish.

What is the difference between iced coffee and cold brew?

Iced coffee is brewed hot and then chilled, so it tastes bright and aromatic. Cold brew is steeped in cold water for many hours, which makes it smoother, sweeter and lower in acidity. Both are served over ice.

How do I stop my iced coffee from tasting watery?

Brew it stronger, use coffee ice cubes instead of plain ice, and chill the coffee before pouring rather than melting the ice to cool it. Plenty of ice also melts more slowly than just a few cubes.

Related guides

• Pour-over coffee ratio The golden 1:16 ratio and cup-size chart.
• What is drip bag coffee? How single-serve pour-over bags work.
• Uses for used coffee grounds Twelve things to do with leftover grounds.

Starting from a single-serve brew? Our drip bag coffee makes a clean base for iced coffee, no machine required.