Sentence:  <WSD>Malted milk</WSD> powder is essentially a nutritional supplement, but it has a sweet, toasty milk flavor (think malt balls and malted milkshakes) that makes it a popular partner for chocolate. 
Meaning of the word marked with <WSD> tags:  A powder made by mixing malted barley, flour and milk, the mixture then being dried by evaporation; initially developed as a nutritional supplement, later used as a flavouring.