Making Iced Coffee With Your Mainstays Maker

Quick answer

• Use the “brew over ice” setting if your Mainstays maker has one.
• Brew directly into a container filled with ice.
• Use double the amount of coffee grounds you normally would for hot coffee.
• Start with cold, filtered water.
• Make sure your ice is fresh and doesn’t have freezer odors.
• Don’t overfill the water reservoir.

If you’re looking to simplify your iced coffee routine, consider investing in a dedicated iced coffee maker like this one. They are designed to brew directly over ice, ensuring a perfectly chilled and flavorful cup every time.

Keurig K-Duo Hot & Iced Single Serve & Carafe Coffee Maker, MultiStream Technology, 72oz Reservoir (Gen 2)

• BREW BY THE CUP OR CARAFE: Brews both K-Cup pods and coffee grounds.
• MULTISTREAM TECHNOLOGY: Saturates the grounds evenly to extract full flavor and aroma in every cup, hot or cold.
• BREW OVER ICE: Adjusts temperature for maximum flavor and less ice melt for single-cup iced coffees and teas.
• STRONG BREW & EXTRA HOT FUNCTIONALITY: Brews a stronger, more intense-flavored cup and the extra hot feature brews a hotter single cup.
• MULTIPLE BREW SIZES: Brew 6, 8, 10, or 12oz single cups or 6, 8, 10, or 12-cup carafes. 12-cup glass carafe specially designed to limit dripping.

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Who this is for

• Anyone who owns a Mainstays coffee maker and wants to make iced coffee.
• Campers and folks who like a cold brew on a hot day without fancy gear.
• People looking for a simple, budget-friendly way to get their caffeine fix cold.

What to check first

Brewer type and filter type

Most Mainstays makers are standard drip machines. You’ll likely use a paper filter or a reusable mesh filter. Check your manual if you’re not sure. Using the wrong filter can lead to grounds in your cup. That’s no fun.

Water quality and temperature

Start with cold, filtered water. Tap water can have off-flavors that come through in your brew, especially when chilled. For iced coffee, you want that flavor to be clean. Cold water is key for brewing directly over ice.

Grind size and coffee freshness

Medium grind is usually the sweet spot for drip coffee makers. Too fine, and it’ll clog. Too coarse, and it’ll be weak. Freshly ground beans make a huge difference. Pre-ground stuff goes stale fast.

Coffee-to-water ratio

This is where iced coffee gets tricky. You need a stronger brew to account for the melting ice. A good starting point is double the grounds you’d use for hot coffee. So, if you use two scoops for a mug of hot, use four for the same amount of liquid, but remember a good chunk will be ice.

Cleanliness/descale status

A dirty coffee maker can make even the best beans taste funky. If you haven’t descaled in a while, do it. Mineral buildup affects taste and performance. It’s a quick win for better coffee.

Step-by-step (brew workflow)

1. Gather your supplies. You’ll need your Mainstays coffee maker, fresh coffee beans, a grinder (if using whole beans), filtered water, ice, and a carafe or heat-safe pitcher.

• What “good” looks like: Everything is clean and ready to go. No last-minute scrambling.
• Common mistake: Forgetting to grab enough ice. Nothing worse than a half-iced coffee.

2. Fill the ice container. Take your carafe or pitcher and fill it about halfway, or a little more, with fresh ice. This is what your strong coffee will brew over.

• What “good” looks like: A solid base of ice ready to chill your brew.
• Common mistake: Using old ice that smells like the freezer. It’ll ruin your coffee’s flavor.

3. Add filtered water to the reservoir. Fill the water reservoir with cold, filtered water. For iced coffee, you’ll want to fill it to the line that corresponds to the amount of liquid coffee you want after it melts the ice. So, if you want 4 cups of iced coffee, fill the reservoir to the 4-cup mark.

• What “good” looks like: Clear water at the correct level.
• Common mistake: Overfilling the reservoir, which can lead to overflow during brewing.

4. Grind your coffee beans. Grind your beans to a medium consistency. If you’re using pre-ground, make sure it’s suitable for drip coffee makers.

• What “good” looks like: Uniform grounds, not too fine or too coarse.
• Common mistake: Using a grind that’s too fine, which can clog the filter and lead to over-extraction.

5. Measure your coffee grounds. This is crucial for iced coffee. Use about double the amount of coffee grounds you’d normally use for the same amount of water for hot coffee. For example, if you usually use 2 scoops for 4 cups of water, use 4 scoops for the 4 cups of water you put in the reservoir.

• What “good” looks like: A generous amount of grounds in the filter basket.
• Common mistake: Under-dosing the coffee, resulting in weak, watery iced coffee.

6. Place the filter and grounds. Put your paper or mesh filter into the brew basket. Add your measured coffee grounds on top of the filter.

• What “good” looks like: The filter is seated properly, and the grounds are evenly distributed.
• Common mistake: Not making sure the filter is fully open and seated, causing grounds to bypass the filter.

7. Assemble the brewer. Place the brew basket back into the coffee maker. Position your ice-filled carafe or pitcher directly under the brew basket.

• What “good” looks like: Everything is securely in place, ready for brewing.
• Common mistake: Forgetting to put the carafe under the spout. Coffee on the counter is a mess.

8. Start the brew cycle. Turn on your Mainstays coffee maker. If it has a specific “brew over ice” setting, use that. Otherwise, just start a regular brew cycle.

• What “good” looks like: The machine starts heating and dripping.
• Common mistake: Pressing the wrong button or not ensuring the machine is properly plugged in and powered on.

9. Let it brew completely. Allow the coffee maker to finish its entire brew cycle. The hot coffee will drip directly onto the ice, chilling it rapidly.

• What “good” looks like: The brewing stops, and the carafe is full of chilled coffee.
• Common mistake: Interrupting the brew cycle, which can result in an under-extracted, weak brew.

10. Stir and serve. Once brewing is complete, give the coffee and ice a good stir. This helps ensure it’s evenly chilled and diluted. Pour into glasses filled with fresh ice.

• What “good” looks like: A cold, refreshing beverage ready to drink.
• Common mistake: Not stirring, leaving some of the coffee lukewarm.

Common mistakes (and what happens if you ignore them)

Decision rules (simple if/then)

• If your Mainstays maker has an “ice” or “over ice” setting, then use it because it might adjust brew strength or timing for optimal iced coffee.
• If you’re brewing directly over ice, then use double the amount of coffee grounds because the melting ice dilutes the brew.
• If your iced coffee tastes weak, then you likely need to use more coffee grounds or less ice.
• If your iced coffee tastes bitter, then your grind might be too fine, or you’ve over-extracted (too much contact time).
• If your iced coffee tastes sour, then your grind might be too coarse, or you’ve under-extracted (not enough contact time).
• If you notice off-flavors, then clean or descale your coffee maker because residue can impact taste.
• If you want a stronger brew without more grounds, then slightly reduce the amount of ice, but be careful not to make it too watery.
• If you’re out of paper filters, then make sure your reusable filter is clean and properly seated to avoid grounds in your cup.
• If you want to speed up chilling, then use smaller ice cubes, but be aware they melt faster.
• If you want to avoid freezer smells, then use ice made from filtered water and store it in a sealed container.
• If your coffee maker seems slow or is sputtering, then it likely needs descaling.

FAQ

Can I just brew hot coffee and then chill it in the fridge?

You can, but it’s not ideal. Brewing directly over ice chills the coffee much faster and preserves more of its fresh flavor and aroma. Fridge chilling can make it taste stale.

How much ice should I use?

A good starting point is to fill your carafe about halfway with ice. The exact amount depends on how strong you like your coffee and how much liquid coffee you’re brewing. You want enough ice to chill it, but not so much that it becomes watery.

What kind of coffee beans are best for iced coffee?

Medium to dark roasts often work well. They have a bolder flavor that can stand up to the dilution from ice. However, experiment with your favorite beans to see what you prefer.

My Mainstays maker doesn’t have an “ice” setting. What do I do?

No worries. Just use the regular brew cycle. The key is to brew directly over ice and adjust your coffee-to-water ratio accordingly (usually double the grounds).

Is it okay to use tap water?

While you can, it’s better to use filtered water. Tap water can contain minerals and chlorine that affect the taste of your coffee, and those flavors become more noticeable when it’s cold.

How do I avoid grounds in my iced coffee?

Make sure your filter is the right type and size for your machine, and that it’s properly seated in the brew basket. A medium grind also helps prevent this.

Can I make cold brew with my Mainstays maker?

No, this method is for making iced coffee by brewing hot coffee over ice. True cold brew requires a much longer steeping time with cold water.

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

• Making true cold brew coffee: This is a different process that requires more time.
• Advanced brewing techniques: Espresso, pour-over methods, and French press are not covered here.
• Specific coffee bean recommendations: We’re focusing on the brewing process, not bean origins or roast profiles.
• Troubleshooting complex electrical issues: Always refer to your Mainstays maker’s manual for safety and repair.
• Using coffee makers with integrated grinders: This guide assumes a standard drip machine.