Walk into Scooter’s and disregard the hot dogs, Italian ice and anything else that doesn’t contain the words frozen and custard. Order a Boston shake, and quiver in awe as the towering milkshake topped with hot fudge and whipped cream is handed over. As you taste how dense, thick, buttery and rich the custard is, you’ll soon be on your way to a full stomach and an ice-cream headache. And it’ll be worth it.