This covetable cookbook is a greatest-hits collection from Sugar Cube, a tiny pink food cart in Portland, Oregon, that is thronged daily by hungry hordes craving voluptuous sweets intensified with a spike of booze, a lick of sea salt, or a "whoop" of whipped cream. Sugar Cube founder and baker Kir Jensen left the fine-dining pastry track to sell her handmade treats on the street. Recipes for 50 of Kir's most enticing cupcakes, cookies, tarts, muffins,...