gistfile1.txt

80 grams (about 1 cup whole beans) coffee
2 cups room temperature water

Makes about 3 iced-coffee

Grind beans coarsely, I used one setting below the coarsest. Mix water and coffee into a container, cover, and let sit for 10 hours.
After, filter the brewed coffee as best you can. The result will be strong, too strong to drink. I suggest diluting with 0.5:1.0 water to brew.
Pour over ice, or, heat.