While in Paris I enjoyed Café Americano served in a normal size cup to a larger size cup. The strength of the coffee is of course related to the ratio of espresso shots to hot water and I found each cafe had a different view of what was ‘perfect’. I suggest if using a standard size coffee cup, starting with one shot of espresso and filling with boiling water (leaving room for milk or cream if desired). If you love your coffee strong, go for two and perhaps consider using a larger mug (10-12 ounce) for a bit more water.