I was curious if I could use a macchinetta to make a latte in one fell swoop. The short answer is I cannot.
Typically, a shot (30 mL) of espresso is brewed and 240 mL (1 cup) of steamed milk is added to it. In my procedure I added a combination of water and 2% milk to the bottom boiling chamber and had it pass through fine ground coffee. The coffee beans were not ground fresh. I heated the pot on medium (#4 on a 7 setting gas range). The water and milk proportions were
- 1/2 cup water, 1/2 cup milk
- 1/4 cup water, 3/4 cup milk
- 0 water, 1 cup milk
Each iteration simply tasted like coffee with cream. One certainly could add flavored syrup to make a vanilla latte with this, but chain coffee houses make them better. Moreover, there are clearly other methods for making cheap lattes at home.
The experiment did not fail, it just collected more data.