Anatomy of a Wood-Fired Oven: What It Takes to Bake the Old Way

Behind every loaf from our Mount Morris bakery is an oven that wasn't bought off a shelf. It was built by hand, using traditional materials and techniques that go back centuries. Here's a look at what actually goes into a wood-fired oven like this, and why it makes such a difference in the bread we bake for customers throughout Mount Morris, Flint, Flushing, Grand Blanc, Montrose, Clio, and Swartz Creek.

The core: a repurposed steel drum

At the heart of the build is a food-grade 50-gallon steel drum, once used for apple cider at Almar's Organic Apple Orchard. Its cylindrical shape makes it a natural mold for an oven chamber, strong, heat-resistant, and able to hold its form under the weight of the materials packed around it.

The shell: cob construction

Wrapped around the steel core is a thick layer of cob, a traditional building material made from clay, sand, and straw. Cob has been used to build ovens and structures for thousands of years because of one key property: it retains heat exceptionally well. Once a cob oven is fired up, the dense material acts like a thermal battery, holding steady, radiant heat long after the flames die down. That's very different from a standard kitchen oven, which cycles its heating element on and off to maintain temperature.

The base: brick flue tile

Underneath the firebox sits a stacked base of brick flue tiles. These provide airflow, insulation, and a stable foundation, helping regulate how heat and smoke move through the structure.

Venting: chimney and door

A chimney built from clay/terracotta tiles runs up through the cob shell to vent smoke safely away from the bake chamber. The oven's mouth is sealed by the drum's original food-grade steel lid, trapping heat inside once a fire has built up a bed of coals, similar to how a Dutch oven traps steam and heat around bread.

Why it matters for the bread

Wood-fired, cob-insulated ovens bake differently than any standard kitchen setup. The steady, high, radiant heat is what produces a deeply caramelized, crackling crust and a fuller, more complex flavor in the crumb, the kind of results that come from centuries-old baking methods, not a temperature dial.

It's slower. It's messier. It takes real physical effort to build and to run. But it's exactly why wood-fired sourdough from a small Genesee County bakery tastes the way it does.