To undergo this kind of conversion or browning.
To brown (sugar, or a foodstuff containing sugar) by means of heat.
To convert (sugar) into caramel.
To become or make brown; to brown.
To make (something) brown; to brown.
To make (something) dark or dusky (“having a rather dark shade of colour”); to brown, to darken.
To become or make dark or dusky; to brown, to darken.