Espresso macchiato contains around 75mg of caffeine content in a single shot and 150mg in an espresso macchiato using a double espresso. Starbucks' Caramel Macchiato and Apple Crisp Macchiato contains 75mg of caffeine in its short and tall servings, with 150mg in its grande and venti sizes. For context, the FDA cites 400mg of caffeine per day as a safe limit for adults.