A regular espresso or flat white requires about 0. 5 cups (120 mL) of milk. Fill the jar no more than halfway so that the milk has room to froth.

Double-check that the lid is on tightly before you shake it to prevent milk spilling on the floor.

This steamed milk has a very similar consistency to that made with a steamer.

If you don’t have a cooking thermometer, heat the milk until it’s warm but not too hot to touch. Turn down the heat if the milk starts to boil.

If you have a pump frother, use this instead.

If you don’t have a French press, foam the milk with a whisk or blend it for 30 seconds in a blender.

Glass and ceramic are good microwave-safe materials.

If you don’t have a whisk, place the milk in a blender for 30 seconds instead.