Summer Cold Brew Coffee Making Method! Super Simple Iced Coffee Tutorial with Illustrated Steps

Thinking About Roasting Your Own Coffee?

Lately, more and more readers have been asking FrontStreet Coffee about roasting coffee beans. Apparently brewing a great cup is no longer enough—people want to roast the beans themselves!

That's a great instinct. Roasting teaches you to understand coffee from a completely different angle, and that understanding loops back into better brewing. But roasting is like cooking vegetables: getting them cooked is easy, getting them delicious is not. So FrontStreet Coffee is going to walk you through how to "stir-fry" a good batch of beans! Before we actually roast anything, though, you need to know the equipment and the professional vocabulary of roasting—it's the foundation everything else sits on.

Roasting Equipment

Honestly, roasting equipment is less mysterious than it sounds. As we said, it's no different from cooking: turning raw beans into roasted beans is simply the product of chemical reactions and physical changes driven by high heat. Which means most everyday cooking tools—an iron pan, a microwave, a popcorn machine—can technically roast coffee.

The catch: they struggle to distribute heat evenly to every bean, so you end up with undercooked or scorched beans all too easily. To heat beans evenly, purpose-built drum roasters exist! (Hand nets are the exception.)

Direct-Fire Roasters

Direct-fire roasters do what the name says: flames heat the beans directly. The drum has a certain number of holes, and the flames touch the beans through them. Done well, direct-fire roasting gives beans excellent flavor expression and a more intense aroma. The downside is equally obvious—with flame on the bean surface, control is hard! Scorching and underdevelopment are routine hazards, so this style really tests the roaster's skill.

Semi-Direct-Fire Roasters

Semi-direct-fire roasters are also called semi-hot-air roasters. The big difference from direct-fire: the drum has no holes, so flames never touch the beans, which slashes scorching incidents. Heat reaches the drum mainly through an intake port on its inner side, and the continuously heated metal drum adds its own energy to the roast, making the process more stable and the beans more evenly heated. That's why most roasters today run semi-direct-fire machines.

Hot-Air Roasters

Hot-air roasters roast with heated air: a blower draws air through a hot coil, and that hot air becomes both the heat source and the mixing force that tumbles the beans. The advantages are precise control over bean color, fast heating, and very even heat distribution—which is why so many roasting studios choose hot-air machines when they develop custom roast curves.

The Vocabulary of Roasting

Next, let FrontStreet Coffee introduce the terms you'll meet in every roasting conversation. Each one marks a specific node or phase in the roast, and each node changes the beans in its own way. Learn these before you roast, and keep them next to your roast curve chart~

Drop Point

The drop point is the moment the green beans go into the roaster. Like baking a cake, you preheat the "oven" to a set temperature before the batter goes in. Every roaster, batch size, bean density, and moisture content calls for a different drop point, and this moment is also where the roast curve begins to be measured.

Turning Point

When beans enter the roaster they soak up heat from the machine, dragging the probe temperature down. At its lowest ebb, the temperature reverses and starts climbing again—that inflection is the turning point.

Yellowing Point

As the beans roast on, their color shifts (green beans start out mostly blue-green or pale yellow) and wrinkles appear on the surface. That stage is the yellowing point.

First Crack

Once the beans have absorbed enough energy, they can't hold it in any longer and release it by cracking, with a crisp "pop"! This is first crack. From the moment first crack begins, the beans are technically roasted and can be dropped at any time. Roasters confirm first crack has genuinely started by hearing several crisp cracks in a row.

Second Crack

If you keep the beans in past first crack, then within about two minutes after the crackling dies down they will start sounding again: second crack. As before, you identify it by sudden sporadic pops—only these are duller and more muffled than first crack's.

The Named Phases Between Those Nodes

Between those markers sit a few named time periods!

Drying Phase

Beans lose moisture from the second they enter the roaster—it runs through the entire process. But there is one stretch where dehydration is fastest: from drop point to yellowing point. That window is called the drying phase.

Maillard Phase

The yellowing point signals the start of the Maillard reaction. From here the beans keep darkening, throw off aromas like toasted bread, and prepare to release their stored energy. The stretch from yellowing point to first crack is what we call the development lead-in.

Development Time

Once first crack begins, the beans are physically "cooked," and you choose how much longer they stay in the drum: this is the development time, and it sets the flavor direction. Want deeper, less acidic beans? Stretch it. Want brighter acidity? Cut it short. But remember there are countless beans in the drum and they don't all finish cooking at once—if development runs too short, some beans come out undercooked, flat, and lacking flavor: the dreaded "underdevelopment."

Wrapping Up

That's plenty for one day! Learning to roast is a long road, and cramming too much at once backfires. Lock in these fundamentals first and take it step by step—once the basics are second nature, "stir-frying" a great batch of beans will be a piece of cake!

- END -

FrontStreet Coffee Recommendation

Once your own roast is ready, cold brew is one of the easiest—and most rewarding—ways to taste it, and the beans below are FrontStreet Coffee's picks for the method. Cold brew amplifies floral and fruit tones while trimming woody and roast flavors, so light-to-medium roasts show their best here. If you love florals in your iced coffee, the FrontStreet Natural Huakui, grown in Ethiopia—the cradle of coffee—absorbs a wealth of sweet aromatics from its fruit during the natural process and yields magnolia, creamy strawberry, dried mango, guava, and black tea in cold brew. For a full juice-like cup, the FrontStreet Kenya Little Tomato, from the Thika region on SL28 and SL34 varieties and washed with Kenya's distinctive K72 double-fermentation, shows cherry tomato, snow pear, black plum, and dark plum sweetness in full under cold extraction—low bitterness, plump acidity, wonderfully refreshing over ice. And for an economical everyday option, the washed FrontStreet Yirgacheffe Guodingding—with its bright, clean acidity and generous florals—works beautifully in cold brew, pouring sweet berries, layered fruit, and honey.