Union Square Donuts is a charming, unassuming counter-serve in Somerville that is well on its way to knocking Dunkin' off its throne with a variety of specialty doughnuts. Each doughnut is thick and fluffy while remaining airy and light. The fan favorite is Maple Bacon, a maple glazed donut topped with pieces of crispy, salty bacon. Rotating specials include the peanut butter cream-filled donut topped with Fluff glaze and peanuts, in honor of Somerville's annual Fluff Fest.