如何在家用Onyx咖啡製作冷萃咖啡
By Onyx Coffee Lab | Published: 2026-08-30
Category: 操作指南
了解如何在家使用Onyx Coffee製作冷萃咖啡。取得簡單的食譜、設備建議,以及製作順滑濃郁咖啡濃縮液的最佳咖啡豆。
Cold brew coffee is a summer staple for many coffee lovers, and for good reason. It’s smooth, low in acidity, and incredibly easy to make at home. With Onyx Coffee Lab’s high-quality beans, you can craft a delicious cold brew concentrate that rivals your favorite café. In this guide, we’ll walk you through the basics of cold brew, from choosing the right beans to brewing and storing your concentrate.

Whether you’re a cold brew novice or looking to refine your technique, this guide covers everything you need. We’ll discuss the best coffee for cold brew, the equipment you’ll need, and a step-by-step recipe that’s simple to follow. By the end, you’ll be able to make a smooth, refreshing cold brew that’s perfect for hot days or as a base for creative drinks.
Why Cold Brew? The Benefits and Flavor Profile
Cold brew is made by steeping coarsely ground coffee in cold water for an extended period, typically 12 to 24 hours. This slow extraction process results in a coffee that is naturally sweeter and less acidic than hot-brewed coffee. The lower acidity makes it easier on the stomach, and the smooth flavor profile is perfect for those who prefer a less bitter cup.
Another advantage of cold brew is its versatility. You can make a concentrated version that you can dilute with water or milk, or use as a base for cocktails and desserts. Cold brew also has a longer shelf life than regular brewed coffee, so you can make a batch and enjoy it throughout the week.
- Smooth and low-acid flavor
- Easy to make in large batches
- Versatile for various drinks
Choosing the Best Coffee for Cold Brew
The best coffee for cold brew is one that you enjoy drinking, but certain characteristics can enhance the cold brew experience. Look for beans with tasting notes that you find appealing, such as chocolate, caramel, or fruit. Onyx Coffee Lab offers a variety of beans that work well for cold brew, including the DOUBLESTAR blend, which has a balanced profile with notes of chocolate and caramel, making it a great choice for a classic cold brew.
Another excellent option is the El Rincon, a single-origin coffee from Colombia that offers a bright, fruity cup. For a more unique cold brew, consider the Panama Finca Deborah Nirvana Gesha, which is known for its floral and jasmine notes. While this is a pricier option, it can produce an extraordinary cold brew for special occasions.
- Choose beans with flavor notes you enjoy
- Medium to dark roasts often work well
- Freshly roasted beans yield the best flavor
Essential Cold Brew Equipment
You don’t need a lot of fancy equipment to make cold brew at home. At a minimum, you’ll need a container for steeping, a fine-mesh strainer or filter, and a way to grind your coffee. A burr grinder is recommended for a consistent grind size, and the Fellow Opus Conical Burr Grinder is a great option that offers precision and ease of use. If you don’t have a grinder, you can ask Onyx Coffee Lab to grind the beans for you, specifying a coarse grind suitable for cold brew.
For the steeping container, a large glass jar or a French press works well. Some people prefer a dedicated cold brew maker, but it’s not necessary. The key is to ensure that the coffee is fully submerged in water and that you can easily strain the grounds afterward.
- Coarse grind is essential to avoid over-extraction
- Use filtered water for the best taste
- A large jar or French press is sufficient
Step-by-Step Cold Brew Recipe
Here’s a simple cold brew recipe that yields a smooth concentrate. You’ll need 1 cup of coarsely ground coffee and 4 cups of cold, filtered water. Combine the coffee and water in a large jar or pitcher, stir to ensure all grounds are saturated, and cover. Let it steep at room temperature for 12 to 18 hours. The longer you steep, the stronger and more concentrated the cold brew will be.
After steeping, strain the mixture through a fine-mesh sieve lined with a paper filter or a cheesecloth. You can also use a French press to separate the grounds. The resulting concentrate can be stored in the refrigerator for up to two weeks. To serve, dilute with equal parts water or milk, or adjust to your taste. Add ice and enjoy!
- Use a 1:4 ratio of coffee to water for concentrate
- Steep for 12-18 hours depending on desired strength
- Strain thoroughly to avoid sediment
Tips for Perfecting Your Cold Brew
To get the most out of your cold brew, pay attention to the grind size. Too fine a grind can result in a bitter and cloudy brew, while too coarse may lead to weak extraction. Aim for a texture similar to coarse sea salt. Also, maintain a consistent steeping time; experimenting with different times can help you find your preferred strength.
Another tip is to use filtered water, as tap water can contain minerals that affect the flavor. Additionally, consider using a scale to measure your coffee and water for consistency. If you’re using Onyx Coffee Lab’s Roaster's Choice 4oz, you can try different beans each time to discover which ones you prefer for cold brew.
- Experiment with steeping time to find your ideal strength
- Use a scale for consistent ratios
- Try different beans to discover new flavor profiles
Serving and Storing Cold Brew
Cold brew concentrate can be enjoyed in many ways. For a classic iced coffee, dilute with water or milk and pour over ice. You can also create a cold brew latte by adding frothed milk, or use it in cocktails like an espresso martini. The concentrate is also great for baking, adding a coffee kick to desserts.
Store your cold brew in an airtight container in the refrigerator. It will stay fresh for up to two weeks, but the flavor is best within the first week. If you prefer a ready-to-drink option, Onyx Coffee Lab offers RTD cold brews that are convenient for on-the-go consumption.
- Dilute to taste with water or milk
- Use in cocktails or baking for a coffee twist
- Keep refrigerated and consume within two weeks
Making cold brew at home with Onyx Coffee is simple and rewarding. With the right beans, equipment, and a little patience, you can enjoy a smooth, delicious cold brew that’s perfect for any occasion. Experiment with different coffees from Onyx Coffee Lab to find your favorite, and don’t forget to share your creations with friends and family.



