How do I make cold brew at home?

Cold brew: coarsely grind 100g of coffee, combine with 700ml of cold filtered water in a jar, stir, cover, and refrigerate for 12–24 hours. Strain through a coffee filter or fine mesh. The result is a smooth, cold concentrate. Dilute 1:1 with water or milk for a standard cold brew. Longer steep times (18–24h) produce more body; shorter times produce lighter coffee. Cold brew has lower acidity than hot-brewed coffee and keeps refrigerated for up to 2 weeks.