[header] How to heat milk [title] Heat it in the microwave. [step] The easiest way to heat milk is in the microwave, but you'll have to keep an eye on it. One cup (250 ml) of milk should reach room temperature within 45 seconds and boil within two and a half minutes. 
Stir it every 15 seconds to keep it from boiling over. [substeps] You can also try setting your microwave to 70 percent power for a slower boil.