malted milk
US /ˈmɔːl.tɪd ˈmɪlk/
UK /ˈmɔːl.tɪd ˈmɪlk/

1.
a powder made from malted barley, wheat flour, and whole milk, often mixed with hot milk to make a drink, or used in confectionery
:
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She enjoyed a warm cup of malted milk before bed.
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The recipe calls for two tablespoons of malted milk powder.