Using a thermometer when you froth your milk allows you to get the perfect temperature. But how do you know if your thermometer is correct? Here’s a quick test:
- Make sure you haven’t had any hot/cold drinks in the last few minutes.
- Put the end of the thermometer in your mouth and suck for 10 seconds
- The reading should be 37 Celsius
And if the thermometer is out? Many milk thermometers have an adjusting screw on the back. Get a small screwdriver and turn the screw to calibrate it to 37 Celsius in your mouth.
If you have more time and the facilities, you should put the tip of the thermometer into simmering water and check that it’s 100c and into iced water (with blocks of ice) and check that it reads 0c.