"What, a milkshake?" He peers over his shoulder at Sam, tugging out the blender- ha, hiding behind the coffee maker. "Yeah. It's milk and ice cream and flavoring like. Syrup and shit. Trick is getting the ideal ratio of ice cream to milk."

Too little milk, it's not sippable. Too much and it's runny and ugh. Delta diverts some processing power to sorting out the ratio with the highest ideal probability of being good. "You've never made them before?"