You already know the math on a daily coffee shop run. Four, five, six dollars a cup, every single day, just for iced coffee you could make at home for a fraction of the cost. The only thing standing between you and your own coffee bar is a jar, some grounds, and patience overnight.
This cold brew concentrate is the base. Steep it once, strain it, and you have café-style iced coffee ready in your fridge for over a week. Pair it with a homemade coffee syrup and you have flavored lattes without the drive-thru line.
Why Make Your Own Cold Brew Concentrate
Coffee shop cold brew is just coffee steeped slow and cold, strained clean, and served strong. There’s no trick to it and no equipment you don’t already own. A jar, a strainer, and cheesecloth get you there. Once you make a batch, you control the strength, the roast, and what goes in your glass.
How It Works
Coarsely ground coffee steeps in cold water for the better part of a day. No heat, no rushing it. The grounds saturate slowly and the flavor comes out mellow and smooth instead of bitter and sharp the way hot-brewed coffee can. Strain it once for a good concentrate, or twice through cheesecloth if you want it glass-clear.
Build Your Iced Coffee Bar
Once you have concentrate in the fridge, the syrup is what turns “black iced coffee” into something worth staying home for. Make one batch of concentrate on a Sunday, keep a few flavored syrups on hand, and you have a different drink every day without touching a coffee shop app.
Favorite flavor combinations:
Homemade Vanilla Syrup + whole milk — vanilla
Homemade Salted Caramel Syrup — https://thisoldbaker.com/microwave-salted-caramel-sauce/ — caramel
Homemade Chocolate Syrup — https://thisoldbaker.com/homemade-chocolate-syrup/ + whipped cream — mocha
Homemade Brown Sugar Cinnamon Syrup + half-and-half — brown sugar cinnamon
Homemade Hazelnut Syrup + cream — hazelnut
Homemade Coconut Syrup + coconut milk — toasted coconut
Storage & Make-Ahead Tips
Concentrate holds in the fridge for up to 10 days, which is what makes this worth batching. Pour it over ice, add milk or a dairy-free swap, stir in a syrup, and you’re done. No equipment beyond what’s already in your kitchen, and no waiting in a drive-thru line before your first meeting.
Frequently Asked Questions
How long does cold brew concentrate last in the fridge?
Stored in a sealed jar or bottle, cold brew concentrate stays fresh in the refrigerator for up to 10 days.
Do I need special equipment to make cold brew at home?
No. A large jar or pitcher, a fine-mesh strainer, and cheesecloth or a nut milk bag are all you need. A dedicated cold brew maker isn’t required.
Can I make cold brew concentrate stronger?
Yes. Increase the coffee to 2½ cups per 8 cups of water for a stronger, more concentrated brew.
What’s the best coffee for cold brew?
Medium and dark roasts produce the richest, most balanced concentrate. Lighter roasts work too, but the flavor comes out brighter and more fruit-forward.
Closing (for post body, before comments)
Thanks for making room in your week for something homemade. Batch this once and your coffee bar runs itself all week. Try a combination, tell me which one becomes your go-to, and I’ll see you in the comments.
Homemade Cold Brew Coffee Concentrate
Ingredients
- 1 1/2 cups coarsely ground coffee medium or dark roast works best
- 6 cups cold filtered water
Instructions
- Add the coarsely ground coffee to a large pitcher, Mason jar, or other non-reactive container.
- Pour the cold filtered water over the coffee grounds.
- Stir gently until all of the grounds are completely saturated.
- Cover the container and refrigerate for 18 to 24 hours.
- Place a fine-mesh strainer over a large bowl or pitcher and line it with cheesecloth, a nut milk bag, or a coffee filter.
- Slowly pour the coffee through the filter. If needed, strain a second time for an extra-smooth concentrate.
- Transfer the finished concentrate to a clean glass bottle or Mason jar with a lid.
Storage
- Store refrigerated for up to 10 days.
How to Make One Glass of Iced Coffee
- Ingredients
- Ice
- ½ cup Homemade Cold Brew Coffee Concentrate
- ½ cup milk, half-and-half, or your favorite dairy-free milk
- 1–2 tablespoons homemade coffee syrup, if desired
Instructions
- Fill a 16-ounce glass with ice.
- Add your favorite coffee syrup, if using.
- Pour in the coffee concentrate.
- Add the milk.
- Stir until well combined and enjoy.
Favorite Flavor Combinations
- Vanilla – Homemade Vanilla Coffee Syrup + whole milk
- Caramel – Homemade Caramel Coffee Syrup + flaky sea salt
- Mocha – Homemade Chocolate Coffee Syrup + whipped cream
- Brown Sugar Cinnamon – Brown Sugar Cinnamon Coffee Syrup + half-and-half
- Hazelnut – Homemade Hazelnut Coffee Syrup + cream
- Toasted Coconut – Homemade Coconut Coffee Syrup + coconut milk
Notes
Use coarsely ground coffee. Fine grounds can make the concentrate cloudy and bitter.
Filtered water produces a cleaner, smoother flavor.
Medium and dark roast coffees create the richest concentrate, while lighter roasts have brighter, fruitier notes.
For a stronger concentrate, increase the coffee to 2½ cups per 8 cups of water.
Cold brew concentrate is designed to be diluted before drinking. Mix it with milk, water, or a combination of both to suit your taste.
This concentrate is the foundation for an easy homemade coffee bar. Make one batch on Sunday, keep a few homemade flavored syrups in the refrigerator, and you’ll have café-style iced coffee ready in just a minute all week long—for a fraction of the cost of a daily coffee shop run.
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