Check out this coffee ice cube hack. Make the perfect iced coffee without watering it down! Recipe: K-Cup Pod Oat milk Ice Cube tray 1. Brew 1, 8 oz cup of coffee with the Instant Solo Coffee Maker. Let the coffee cool. 2. Pour cooled coffee into an ice cube tray, freeze for 3 hours or longer. I would freeze overnight for the best results. 3. Pour coffee ice cubes into a chilled glass. 4. Pour oat milk into Instant Frother, using the cold foam setting. 5. When the frother is finished, pour oat m