Making Cold Brew: Using Your Aldi Coffee Maker

Quick answer

• Your Aldi coffee maker likely uses a drip method, not ideal for true cold brew.
• For cold brew, you’ll need a separate container, coarse grounds, and time.
• Steep grounds in cold water for 12-24 hours.
• Strain the concentrate thoroughly.
• Dilute with water or milk to taste.
• Enjoy your homemade cold brew!

Who this is for

• Anyone who bought an Aldi coffee maker and is curious about cold brew.
• Coffee drinkers looking for a smoother, less acidic iced coffee.
• Home brewers wanting to experiment without fancy gear.

What to check first

Brewer type and filter type

Most Aldi coffee makers are standard drip machines. This means they heat water and run it through grounds. True cold brew steeps grounds in cold water. So, your Aldi machine probably won’t make cold brew directly. You’ll need a separate pitcher or jar. For straining, cheesecloth or a fine-mesh sieve works.

Since your Aldi machine isn’t ideal for cold brew, you’ll need a separate container. A sturdy glass pitcher is perfect for steeping your coffee grounds.

No products found.

Water quality and temperature

Use filtered water. Tap water can have off-flavors that mess with your brew. For cold brew, you want cold water, plain and simple. Room temperature is fine too, but actual cold water from the fridge is best. No heating needed here.

Grind size and coffee freshness

This is key for cold brew. You want a coarse grind. Think sea salt or breadcrumbs. Too fine, and you’ll get sludge and over-extraction. Freshly ground beans are always better. Grind right before you brew if you can.

Coffee-to-water ratio

This is where you make a concentrate. A good starting point is a 1:4 ratio of coffee to water. So, for every cup of coffee grounds, use four cups of water. You can adjust this later. More coffee means a stronger concentrate.

Cleanliness/descale status

Even if you’re not using your Aldi machine for this, keeping your brewing gear clean is crucial. Old coffee oils turn rancid and ruin the taste. Wash your pitcher or jar well. Make sure any strainers are spotless.

Step-by-step (brew workflow)

1. Gather your gear. You’ll need a large jar or pitcher, coarse coffee grounds, and cold, filtered water.

• What “good” looks like: Everything is clean and ready to go.
• Common mistake: Using a dirty container. Always wash it first.

2. Measure your coffee. Use a 1:4 ratio of coffee to water as a starting point. For example, 1 cup of grounds to 4 cups of water.

• What “good” looks like: Accurate measurement for a balanced brew.
• Common mistake: Eyeballing it. This leads to inconsistent results.

3. Add coffee to the container. Pour your coarse grounds into the jar or pitcher.

• What “good” looks like: All the grounds are in the container.
• Common mistake: Spilling grounds everywhere. Go slow.

4. Add cold water. Pour the measured cold, filtered water over the grounds.

• What “good” looks like: All grounds are saturated.
• Common mistake: Not making sure all the coffee is wet. Stir gently if needed.

5. Stir gently. Give it a quick, gentle stir to ensure all the coffee grounds are submerged.

• What “good” looks like: A uniform mixture.
• Common mistake: Over-stirring, which can release bitter compounds.

6. Cover and steep. Seal the container and let it sit at room temperature or in the fridge.

• What “good” looks like: It’s sealed and out of the way.
• Common mistake: Leaving it uncovered, which can absorb fridge odors.

7. Wait (12-24 hours). The longer it steeps, the stronger and more concentrated it gets. 18 hours is a good middle ground.

• What “good” looks like: Patience.
• Common mistake: Impatience. Rushing the steep time.

8. Prepare to strain. Place a fine-mesh sieve lined with cheesecloth over another clean pitcher or bowl.

• What “good” looks like: A secure setup for straining.
• Common mistake: Not using a double layer of cheesecloth, leading to sediment.

9. Strain the concentrate. Slowly pour the steeped coffee mixture through the sieve and cheesecloth.

• What “good” looks like: A clear, dark liquid.
• Common mistake: Pouring too fast, forcing sediment through.

10. Strain again if needed. If there’s still sediment, strain it a second time.

• What “good” looks like: A smooth concentrate.
• Common mistake: Settling for a gritty brew.

11. Dilute and serve. Your cold brew concentrate is ready! Dilute it with cold water or milk to your desired strength. Add ice.

• What “good” looks like: A refreshing drink.
• Common mistake: Drinking the concentrate straight. It’s too strong!

Common mistakes (and what happens if you ignore them)

Mistake	What it causes	Fix
Using finely ground coffee	Gritty texture, bitter taste, clogged filter	Use a coarse grind (like sea salt).
Not using filtered water	Off-flavors, metallic taste	Always use filtered or good-tasting tap water.
Incorrect coffee-to-water ratio	Weak or overly strong brew	Start with 1:4 (coffee:water) and adjust to taste.
Insufficient steeping time	Weak, watery, underdeveloped flavor	Steep for at least 12 hours, ideally 18-24.
Over-steeping	Bitter, astringent, unpleasant taste	Stick to the 12-24 hour range.
Not straining thoroughly	Muddy texture, gritty mouthfeel	Use a fine-mesh sieve and cheesecloth, strain twice if needed.
Using old or dirty equipment	Stale, rancid flavors	Clean all containers and strainers thoroughly.
Not diluting the concentrate	Overpoweringly strong, undrinkable	Always dilute with water or milk to your preferred strength.
Using hot water for steeping	Results in a hot brew, not cold brew	Use cold or room-temperature water only.
Not storing concentrate properly	Spoilage, off-flavors	Store in an airtight container in the fridge for up to 2 weeks.

Decision rules (simple if/then)

• If your coffee tastes bitter, then try a coarser grind because fine grinds over-extract.
• If your cold brew is weak, then use more coffee grounds or steep for longer because under-extraction leads to a weak flavor.
• If you see sediment in your cup, then strain the concentrate again because thorough straining is key for smoothness.
• If your brew has off-flavors, then check your water quality because tap water can introduce unwanted tastes.
• If you’re in a hurry, then cold brew isn’t for you because it requires significant steeping time.
• If you want a stronger flavor, then increase the coffee-to-water ratio in your next batch because more coffee means a richer concentrate.
• If you notice a stale taste, then clean your brewing equipment thoroughly because old coffee oils go rancid.
• If you’re brewing for the first time, then start with an 18-hour steep time because it’s a good balance between strength and flavor.
• If you prefer a smoother, less acidic coffee, then cold brew is a great option because the cold water extraction method reduces acidity.
• If you don’t have cheesecloth, then use a very fine-mesh sieve, but be prepared for potential sediment because it’s less effective at filtering fine particles.

FAQ

Can I use my Aldi coffee maker to make cold brew?

No, not directly. Your Aldi coffee maker is designed for hot drip coffee. True cold brew requires steeping coffee grounds in cold water for an extended period.

What kind of coffee beans should I use for cold brew?

You can use any coffee beans you like, but medium to dark roasts often work well. The important thing is the grind size.

How coarse should the coffee grounds be?

Aim for a coarse grind, similar to sea salt or breadcrumbs. A fine grind will result in a muddy, over-extracted brew.

How long does cold brew concentrate last?

Stored in an airtight container in the refrigerator, cold brew concentrate typically lasts for about 1 to 2 weeks.

What’s the best way to dilute cold brew concentrate?

Start with a 1:1 ratio of concentrate to water or milk. Adjust to your personal preference. Some people prefer a 1:2 ratio for a less intense flavor.

Why is my cold brew bitter?

Bitterness usually comes from over-extraction. This can be caused by too fine a grind, steeping for too long, or using water that’s too hot.

Can I make cold brew without a special cold brew maker?

Absolutely. A simple pitcher or jar, some coffee grounds, cold water, and a strainer (like cheesecloth or a fine-mesh sieve) are all you need.

How much caffeine is in cold brew?

Cold brew concentrate typically has more caffeine than drip coffee because of the higher coffee-to-water ratio used in brewing. However, the final caffeine content in your cup depends on how much you dilute it.

What this page does NOT cover (and where to go next)

• Specific types of coffee beans ideal for cold brew.
• Advanced cold brew techniques like nitrogen infusion.
• Detailed comparisons of different cold brew maker devices.
• Troubleshooting specific flavor profiles beyond general bitterness or weakness.
• Recipes for cold brew drinks beyond simple dilution.