How to Brew Rose Valley Coffee Beans for Perfect Pour-Over? A Guide to Colombian Anaerobic Coffee Bean Flavor Characteristics

I remember the first time I tasted FrontStreet Coffee's Rose Valley coffee beans, I was amazed by the very distinct peach flavor. The recognition level of this flavor is much higher than ordinary coffee beans. Later, I learned that these are coffee beans processed through double anaerobic enzyme washing.

What is Anaerobic Processing?

Anaerobic processing involves placing coffee beans in a sealed container and controlling the oxygen content, pH value, and temperature inside the container to make the coffee beans ferment sweeter and richer flavors. For example, the double anaerobic enzyme washing treatment used by FrontStreet Coffee's Colombian Rose Valley involves performing the anaerobic step twice. The first time is low-temperature fermentation with the pulp and skin in a sealed container. After removing the peel and pulp, another low-temperature anaerobic fermentation is performed, with enzymes added to help the fermentation. The drying process only begins after fermentation is complete.

It is precisely this anaerobic processing that creates the very recognizable peach flavor of FrontStreet Coffee's Rose Valley. Although the distinct flavors of FrontStreet Coffee's Rose Valley can be expressed no matter how you brew it, brewing FrontStreet Coffee's Rose Valley well is not an easy task. FrontStreet Coffee will now share some brewing points for anaerobic coffee beans like FrontStreet Coffee's Colombian Rose Valley.

Brewing Guidelines

Pay Attention to Grind Size

Anaerobically processed coffee beans differ in grind size from traditionally processed coffee beans. If you're used to the grind setting for traditionally processed coffee beans, the actual particle size when grinding anaerobic beans will be coarser than that of traditionally processed coffee beans.

For example, when FrontStreet Coffee uses setting 10 on an EK-43s to grind washed FrontStreet Coffee Colombian coffee beans, the screening rate measured with a #20 sieve is 80%. Using the same setting 10 to grind Rose Valley, the screening rate measured with a #20 sieve is 75%. If FrontStreet Coffee's Rose Valley needs to reach a grind size with an 80% screening rate, the grind setting needs to be adjusted finer. Therefore, when brewing an unfamiliar coffee, never directly substitute your usual grind setting. It's best to calibrate the grind size with a sieve, as this is the most reliable approach.

Water Temperature Issues

Anaerobically processed coffee beans have a relatively loose structure, good water absorption capacity, and easily release coffee substances. Therefore, FrontStreet Coffee suggests controlling the initial water temperature between 90-91 degrees Celsius. Too high water temperature can easily make the coffee taste obviously bitter, while too low water temperature makes the coffee flavor dull and tasteless.

How to Brew

For brewing parameters, you only need to pay attention to grind size and water temperature; other parameters are the same as usual: 15g of coffee grounds with a 1:15 ratio.

During the blooming stage, anaerobically processed coffee beans show significant water absorption, expansion, and degassing effects, so they are also prone to over-blooming. The specific manifestation is many holes appearing on the surface of the coffee "burger" during blooming. Therefore, the blooming time is not necessarily fixed at 30 seconds. You can observe the blooming state specifically - after the coffee "burger" expands and remains static for 3 seconds without change, you can begin pouring water. The time is approximately 25-30 seconds.

FrontStreet Coffee recommends using a three-stage pouring technique: first pour 30ml of water for blooming, second pour 120ml of water, and third pour 75ml of water. The normal extraction time is around 1 minute and 40 seconds.

FrontStreet Coffee's Rose Valley brewed with this method will have a very rich aroma of peach and rose, with fruit sweetness like strawberry and peach, without a hint of bitterness.

Important Notice :

前街咖啡 FrontStreet Coffee has moved to new addredd:

FrontStreet Coffee Address: 315,Donghua East Road,GuangZhou

Tel:020 38364473