The Molasses-Glazed Cruller of the Working Waterfront: A Morning at The Holy Donut

In the early hours on the cobblestone streets of Portland’s Old Port, the air carries a distinct mingling of scents: the sharp salt of the Atlantic, the diesel of lobster boats warming their engines, and the deep, earthy sweetness of frying dough. While many American cities are defined by their bakeries, Portland has a specific obsession that feels uniquely tied to the rocky soil of the state itself.

At The Holy Donut, the rush begins long before the fog lifts from the Fore River. This is not the airy, yeast-risen confection of a national chain. Instead, it is a heavy, substantial pastry made with Maine potatoes. The result is a donut that manages to be simultaneously crisp on the outside and remarkably moist within, a reflection of New England’s penchant for hearty, unpretentious ingredients that can withstand a North Atlantic winter.

Local Story

The story of the Maine potato donut—or the 'spudnut' as it is sometimes called in other parts of the country—is one of necessity and regional pride. Maine has long been one of the nation's leading producers of potatoes, particularly in Aroostook County to the north. Incorporating mashed potatoes into dough was originally a clever way for home bakers to stretch their flour supplies while adding moisture and shelf life to their bread.

Leigh Kellis, who founded The Holy Donut in 2012, took this rural tradition and brought it to the urban center of Portland. What started as a small, family-run operation in a tiny commercial kitchen quickly became a local phenomenon. The secret lies in the starch. Unlike flour, which can become tough when overworked, the starch in the potato keeps the crumb tender and adds an earthy richness that balances the sugar of the glazes.

You’ll see the diversity of the city in the queue: fisherman in Grundéns bibs standing behind lawyers in wool coats, all waiting for a Dark Chocolate Sea Salt or a Maine Potato Ginger glazed ring. It is a democratic space, anchored by the shared knowledge that a potato donut is essentially a full meal in a paper bag.

Experience Guide

Visiting The Holy Donut requires a bit of tactical planning. Like many of Portland’s most beloved institutions, the most popular flavors can sell out by mid-morning. The flagship location on Commercial Street offers a perfect vantage point for watching the working waterfront, though the Exchange Street shop puts you right in the heart of the historic architecture.

When you reach the counter, look for the 'Maine Sea Salt' or the 'Dark Chocolate Sea Salt.' These are the pillars of the menu, providing a perfect counterpoint to the natural sweetness of the potato. For a flavor that truly feels like the state of Maine, the 'Allen’s Coffee Brandy' glaze pays homage to the local spirit of choice for many Mainers. The texture here is the main event; it is dense, almost like a piece of pound cake, and far more filling than a standard donut.

Grab your box and walk down to the Custom House Wharf. Find a piling or a bench, watch the sea gulls hover over the returning trawlers, and tear into a donut that tastes less like a snack and more like the landscape. If you are using Zuro to map out your morning, you can easily link this stop with a walk along the Casco Bay Lines ferry terminal just a few blocks away.

The Science of the Spud

The use of potatoes in baking is not just a gimmick; it is a matter of chemistry. When potatoes are boiled and mashed into the dough, the starch molecules absorb more water than wheat flour. During the frying process, this moisture is trapped inside, creating a humid interior that resists drying out. This gives the Holy Donut its signature 'tug'—a slight resistance when you bite into it—and a weight that makes a single donut feel like a substantial breakfast. The flavors are often derived from local ingredients, including Maine blueberries and maple syrup, further grounding the experience in the local geography.

Navigating the Old Port

Portland’s Old Port is a labyrinth of 19th-century brick buildings and salt-slicked piers. After securing your donuts, it is worth exploring the neighboring streets. The area is a hub for independent retail and maritime history. Stop into the nearby shops selling Maine-made sea salt or hand-sewn canvas bags made from recycled sails. The proximity of the bakery to the water means you are never more than a few minutes’ walk from a view of the harbor islands, making it the highest-rated breakfast walk in the city.