Ristretto, known in full in Italian as caffè ristretto, is a "short shot" of a highly concentrated espresso coffee. It is made with the same amount of ground coffee, but extracted using half as much water. A normal short shot might look like a ristretto, but in reality, would only be a weaker, more diluted, shot. The opposite of a ristretto is a lungo ('long'), which has double the amount of water. The French call a ristretto café serré.
