New Handheld Electric Milk Frother Blue The mixer is battery powered so you don't have to worry about cords and finding sockets. Heat up the milk, immerse the espresso maker into the cup and turn it on. The coffee frother, electric milk frother, will start creating creamy froth on the milk instantly. Within 15 - 20 seconds, you have a cup filled with creamy froth and ready to go into your coffee latte. #frother #milk #coffee 050622