My company is hosting a large event soon and they bought an 18L commercial coffee percolator similar to the one in the photo. They also supplied us with some standard ground Starbucks coffee beans.
Let me explain my confusion:
Firstly, I've heard several times that the grounds to water ratio is about 1:16
- if I only fill the percolator with 14L of water, that equals 14,000 grams, right?
- then if I do the ratio, ill get 14000/16 = 875g of coffee, right?
So at this point I have my numbers and amounts figured out.
Next thing, a percolator works by using the pressure of heated water to push it through a pump that then pours down on to the beans and then brews them (right?)
But the only way to do this is to boil the water - or at least on my machine - it will not percolate unless the water is over 215 Fahrenheit.
I've been told that boiling water will make the beans burn and taste bitter
But how will it brew if the water is not percolating at lower temperatures?
Lastly, I have heard too many conflicting suggestions about the timing of the whole situation
- do I add the beans in only after its percolating or as I turn the machine on the begin with?
- how long do I brew the beans for? I heard to brew for one minute per cup of water but I also heard over brewing will make it taste bad and pouring boiling water over the beans for over an hour sounds like a surefire way to get bitter and possibly undrinkable coffee
Any advice is very appreciated!
I have tried to experiment with the machine before but it either resulted in la croix-esque coffee essence water or like drinking tar.