As a coffee lover, how to identify the quality of cooked coffee beans is the most important knowledge.
Choose fresh coffee beans. When buying, pay attention to whether the color of the beans and the size of the particles are the same. Good coffee beans are shiny and have a strong aroma without being mixed with peculiar smell. No matter what kind of coffee beans, freshness is an important factor affecting the quality.
When shopping, grab one or two coffee beans in your mouth and chew them with a crisp sound (indicating that the coffee is not damp) and the fragrance of the teeth and cheeks is the top grade, but it is best to squeeze it with your hands to feel whether it is solid, rather than buying crispy coffee. If the coffee bean has lost its fragrance or smells stale, it means that the coffee bean is no longer fresh and is not suitable for purchase.
Can I eat coffee beans? Freshly fried coffee beans are not suitable for immediate consumption and should be stored for a week to completely release the gas from the beans.
Generally speaking, the best drinking period for coffee is a week after stir-frying, when the coffee beans are the freshest and the Aroma taste is the best.
In addition, the purity of coffee beans is also another consideration. The expert candidate for coffee is not necessarily to look at the size of the particles, but to grab a handful of individual coffee beans, about dozens of portions, to see whether the color of each single bean is the same. whether the particles are similar in size and shape, so as to avoid buying shoddy products disguised as mixed beans.
But if it is a comprehensive bean, different size and color is a normal phenomenon. In addition, heavy heat and medium-deep roasting will cause coffee beans to produce oil, but if the lightly roasted beans produce oil, they have gone bad, not only reducing aroma, but also astringent and sour taste.
In short, when buying coffee, we should pay attention to its freshness, aroma and whether it is stale or not, and the ideal purchase quantity is to be able to drink it in half a month.
Source: romantic story of Mu Quan Moon
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Coffee roasting knowledge: how much does the weight of cooked coffee beans decrease after roasting?
Weight reduction: due to the evaporation of water, the weight is reduced by 15-20%. In general, the moisture content of our coffee beans is 10-12%. In addition, the weight lost is generally in silver skin, dust, material changes, and carbon dioxide loss. Most of the less weight is moisture. Volume increase: due to the formation of CQ2, the volume increases by 30-60% and the specific gravity of the components changes:
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Coffee flower-pulling technique: how to pull tulips? Flower-drawing method of Tulip Coffee and production of Milk foam
The most important thing in making complex patterns is the need for a jar of high-quality milk foam, and the temperature of the foam is a key factor affecting the quality of the foam. In this chapter, we will share tulip coffee with friends and hand temperature measurement skills with friends at the same time. Tulip coffee flower drawing steps: 1. Pour Grandma Niu into the coffee solution (3 circles); 2. Find the middle of the cup.
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