Extract of Coffee
Ingredients
Directions
Prepare
Fill the coffee maker with ½ cup of ground coffee.
Pour boiling water down the tube into the lower part of the coffee maker.
Replace the box with the coffee and light the lamp.
Brew
Allow steam to force the water through the coffee for no more than 5 minutes.
If it takes longer, grind the coffee coarser until the process takes only 3 minutes.
When the extract is pale-colored, extinguish the lamp and put on the lid.
Serve
Draw off the extract using the faucet.
Transcribed from a scanned cookbook and modernised for today's kitchens. Where the book gave no heat or time, or said "a moderate oven", the temperatures and times here may be modern equivalents rather than the book's own figures.
Explore the science
What each ingredient does
- Ground coffee
- Supplies the flavor compounds that hot water dissolves out to make the extract.
- Boiling water
- Acts as the solvent that extracts flavor from the grounds and carries it into the drink.
The step that matters
Limit the brewing time to about 5 minutes. Hot water left in contact with the grounds too long pulls out excess bitter compounds, so the extract turns harsh. Coarser grinding shortens the extraction, which is why the step asks for a grind adjustment when brewing runs long.
“What each ingredient does” and “The step that matters” were written by Claude from this recipe’s own method and reviewed in samples by CompKitchen.
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