In a mason jar combine all ingredients. Use a milk frother moving up and down in the glass to combine and thicken up for about 20-30 seconds.
Taste and adjust the amount of extract (we like peppermint) you want in it. Start with 1/8 as it is strong and add a bit more if you want stronger. Thin out with a bit more milk to your liking.
** If you want a real deep chocolate flavor use chocolate malted milk, for tamer use the vanilla version.