Highwire makes the best macchiatos. (Contrary to what Starbucks tells you, it's actually a shot of espresso with a small amount of milk and a dollop of foam.) At Highwire, the ratio of milk to crema is perfect, and there's just enough milk to balance the acidity of the espresso. If you order it for here, it'll come in an avocado-green cup with an accent of artful foam. One sip and you'll realize how much care Highwire's baristas put into the tiny cup. The amount of time it takes you to drink it is just enough to stroll the busy Market Hall and its carnival of strollers, shoppers, and fancy cookbooks. It's an Oakland experience you shouldn't miss.