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I just bought a fancy Cuisinart 12 cup machine and some fairly pricey freshly ground coffee.

The machine came with a scoop that is equal to 5 g (1 tsp). The machine advises not to use more than 15 scoops. 75 g (2 ⅔ oz) is a dangerous amount for some reason, probably overflowing or clogging the filter basket.

Anyway, how many scoops of coffee would you recommend to make a full 12 pot?

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Your machine's instructions call for 15 TABLESPOONS (see bottom-right corner note at page 3). 15 tbsp = 225 g. –  J.A.I.L. Nov 23 '12 at 10:05
    
Are you sure the scoop measures 5 g? All the coffee scoops I've ever seen (from different makers) are 7~8 g (½ tbsp). –  J.A.I.L. Nov 23 '12 at 10:14
    
The fineness of the grind will affect how the coffee maker deals with the grounds. My experience is that if I use the "normal" full-pot amount of a finer ground, my basket will overflow. –  Kristina Lopez Nov 23 '12 at 16:58
    
@J.A.I.L. 1 tbsp of coffee is 5g not 15g. A tablespoon of sugar is 15g, but coffee is less dense than sugar. So 15 tbsp is 75g not 225g, 225g would be a full small pack of coffee for one pot! –  chim Jun 2 at 9:50

4 Answers 4

Normally retailers estimate between 7g and 8g per cup for normal coffee. Try 8g and work your way up. So 12*8=96g for starters.

You might find this article by Harold McGee interesting.

When I dropped the strength close to Mr. Hoffmann’s preferred 1.5 percent by using a third less ground coffee (about 12 grams of coffee to 180 grams, or 6 fluid ounces, of water), the fruity aroma was much more evident, and the flavor generally brighter and more lively. Clarity is a good word for the overall impression.

Edit: Note that I'm talking about espresso cups that are 60ml as opposed to McGee's 180ml cups. Multiply the amount of coffee for the amount of water you are actually using.

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I worked as a coffee roaster for a number of years and met a lot of people. There is a lot of variation to this answer.

What I found works the best is 10-11 g of coffee per 6 oz cup, or 180 mL, so 12 cup maker would be 120 g. Also, the coffee should always be ground to suit the particulars of the brewing method.

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You bring up a very important point -- many coffee & tea devices measure in 'teacups' (6 fl.oz), not the standard american measuring cup (8 fl.oz). So a '12 cup' coffee maker might be 72 oz (~2.1L) or 96 oz (~2.8L) –  Joe Nov 24 '12 at 17:52

The Cuisinart Pot measurement is 5 oz=1 cup. So a full 12 cup pot is 60 oz.

If you are used to an 8 oz cup, the pot will yield 7.5 cups. Coffee standard is 7 or 8 grams per cup of water for normal tasting coffee. At 7 grams per cup, you would be at 52.5 grams of coffee grounds per pot. At 8 grams, you would use 60 grams.

If you are used to a 6 oz cup, the pot will yield 10 cups. Coffee standard is 7 or 8 grams per cup of water for normal tasting coffee. At 7 grams per cup, you would be at 70 grams of coffee grounds per pot. At 8 grams, you would use 80 grams.

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So, first, assume that the coffee maker will not brew properly, either with temperature or brew time. In fact, almost 0 home coffee makers brew coffee properly (exception being the technoverm which is rather pricey).

Usually you can assume 1-2 TBSP per 6oz cup of coffee, but this can vary greatly based on grind and your coffee maker. Your best bet is to start with 2TBSP/6 oz cup (so 12 TBSP, or 3/4 cup) for the full 12 cups. Then, if that's too strong or not strong enough, adjust based on your tastes and how the coffee machine brews. Like all tools, every one is a little different so you'll have to play with it to hone in exactly how you like it.

Also, if you switch brands of coffee, expect to repeat the process once again.

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