How to make iced coffee
Brew coffee stronger than usual or use an overnight cold brew, then pour over ice and add milk if you like. Strong brew keeps the drink from tasting watery as the ice melts.
Iced coffee turns thin when hot coffee meant for a mug hits a full glass of ice. The ice melts and dilutes a brew that was never concentrated enough. The fix is a stronger hot brew poured over ice or a cold brew concentrate mixed with water or milk.
This guide covers both paths. For a fast glass, brew hot coffee at about 1.5 times your usual strength (or use less water in a pour-over or drip cycle), cool it briefly and pour over ice. For a smoother less acidic batch, steep coarse grounds in cold water 12 to 18 hours, then filter.
Fill the glass with ice first so the drink chills on contact. Leave room for milk or a sweetener if you use them. Coffee ice cubes made from leftover coffee avoid extra dilution on slow sipping days.
You will need coffee, a brewer or jar and strainer for cold brew, ice, a glass and optional milk or simple syrup. Any roast works. Medium or dark often tastes familiar over ice.
Step-by-step guide
Time: 10 minutes for hot-brew iced; 12 to 18 hours for cold brew
What you need
- Ground coffee (or beans to grind)
- Coffee maker, pour-over or jar and filter for cold brew
- Ice
- Tall glass
- Optional: milk, cream or sweetener
- Optional: leftover coffee for coffee ice cubes
Before you start
- Hot glassware can crack if it is not rated for temperature swings. Use a sturdy glass and do not pour boiling coffee into a fridge-cold tumbler.
- Cold brew still contains caffeine. Steep time changes strength more than people expect.
- Refrigerate cold brew and use within about a week.
Step 01
Choose hot-strong or cold brew
Both work. Hot-strong is fast. Cold brew is smoother and batch-friendly.
Illustrative: pick a fast hot concentrate or an overnight cold steep. Do this step in order
1a
Hot method: brew about 1.5× strong
Use your usual coffee amount with about two-thirds the usual water or add 50% more grounds to a full water cycle. You want a concentrate that can survive ice melt.
1b
Cold brew: combine grounds and cold water
Use about 1 cup (85 g) coarse grounds to 4 cups (950 ml) cold water in a jar. Stir to wet all grounds. This makes a concentrate you will dilute later.
1c
Steep cold brew 12 to 18 hours
Cover and refrigerate 12 to 18 hours. Longer steeps taste stronger and can turn bitter. Strain through a coffee filter or fine mesh lined with a filter.
Step 02
Prep ice and glass
Ice first keeps the drink cold from the first sip.
Illustrative: fill with ice before the coffee goes in. Do this step in order
2a
Fill the glass with ice
Pack the glass with ice cubes. More ice actually melts slower in a full cold drink than a few cubes in lukewarm coffee.
2b
Optional: use coffee ice cubes
Freeze leftover coffee in an ice tray. Coffee cubes chill without watering the drink down as they melt.
2c
Cool hot brew slightly if needed
Let screaming-hot coffee sit 2 to 3 minutes or pour into a metal cup to drop the temperature before it hits a delicate glass. Do not wait until it is lukewarm or the ice will not matter.
Step 03
Pour and dilute to taste
Build the glass so strength lands where you like it.
Illustrative: pour over ice so chilling starts immediately. Do this step in order
3a
Pour hot concentrate over ice
Fill most of the glass with the strong hot brew. Leave a little room for milk. Stir once so the temperature evens out.
3b
Dilute cold brew concentrate
Start with equal parts cold brew concentrate and cold water or milk over ice, then adjust. Some concentrates want 1:2. Taste as you go.
3c
Avoid pouring weak hot coffee on ice
Standard mug-strength coffee plus a tall ice fill almost always tastes thin. Common mistake: brewing as usual and hoping the ice will not matter.
Step 04
Finish and serve
Season the glass the way you like hot coffee, just colder.
Illustrative: milk and sweetener last so you can taste as you add. Do this step in order
4a
Add milk or cream if you want
Pour milk, cream or a non-dairy option to taste. Stir so it distributes through the cold coffee.
4b
Sweeten while it is still easy to stir
Simple syrup dissolves better than granulated sugar in cold drinks. Stir well if you use sugar.
4c
Drink while the ice still holds
Iced coffee is best before the ice fully collapses. Store leftover cold brew concentrate covered in the fridge up to about 7 days.
Done when
- Brew concentrated (hot method) or steeped (cold brew)
- Glass filled with ice
- Coffee poured over ice
- Milk or sweetener adjusted to taste
- Drunk before full melt if you want peak strength
Eagle Frame's takeaway: brew stronger than a hot cup or use cold brew, pour over plenty of ice and adjust milk or sweetener at the end. Strength up front beats watery ice melt later.