03/06/2026
Alright class, gather around.
Today we’re looking at the different stages of coffee roasting — starting with a raw green bean and ending with a dark roasted coffee bean ready for brewing.
All of these beans are the same coffee, just roasted to different levels. What changes is the color, smell, and the sounds the beans make during roasting.
Let’s walk through them from left to right.
Green Coffee Bean
This is coffee in its raw form before roasting. The color is pale green or grayish. It smells a little like fresh grass, peas, or hay. At this stage it’s dense, hard, and definitely not ready to brew.
Drying Phase / Early Roast
The beans start turning yellow as moisture begins to evaporate. The smell shifts from grassy to something more like warm bread, toasted grain, or oatmeal. The beans are still very dense and haven’t expanded yet.
Light Cinnamon Stage
Now the beans start developing a light tan color. Sugars inside the bean begin to caramelize. Aromas become sweeter — think toasted nuts or baking bread.
Approaching First Crack
The beans deepen to a light brown and expand. Pressure builds inside the bean as steam forms. The smell is now sweet, bready, and slightly caramel-like.
First Crack
This is where the magic really starts. The beans make an audible crack similar to popcorn popping. The bean structure expands and the roast becomes what many call a light roast. Flavors here tend to highlight the origin characteristics of the coffee.
Light to Medium Roast
The beans turn a richer brown and the aromas get deeper. You’ll smell caramel, toasted sugar, and chocolate notes.
Medium Roast
Body increases and sweetness develops further. The smell becomes chocolatey, nutty, and rich.
Approaching Second Crack
The beans darken significantly and you’ll begin to hear a softer, more rapid second series of cracks called second crack, where the bean structure starts breaking down further.
Dark Roast
At this point the beans are very dark brown, sometimes nearly black. Oils may appear on the surface. Aromas become smoky, bold, and intense.
Same coffee. Different roast levels. Completely different flavor experiences.
Coffee roasting is basically controlled delicious destruction — turning a grassy green seed into something that smells like chocolate, caramel, and heaven in a cup.