What method of making coffee uses the least amount beans?

Here's why:

* Espresso uses a very fine grind and high pressure to extract a concentrated shot of coffee. A single shot typically uses around 7-9 grams of coffee beans.

* Other methods like drip coffee, French press, and pour over typically use 1-2 tablespoons of coffee grounds per cup, which is significantly more than espresso.

However, it's important to note that the strength of the coffee also depends on the ratio of coffee to water. While espresso uses less coffee, the concentration is much higher, resulting in a stronger cup.

So, if you're looking for the most *efficient* way to use coffee beans, espresso is the winner. But if you prefer a weaker or more diluted coffee, other methods may be a better choice.