Pork belly and bacon are the same cut of meat — bacon is just pork belly that has been cured (preserved with salt and usually smoked). This is one of those facts that surprises people who have eaten bacon their entire lives without thinking about where it comes from. Understanding this connection opens up a world of cooking possibilities beyond laying strips in a pan at breakfast.
Direct Answer
Pork belly is a boneless, rectangular slab cut from the underside of the pig. It has alternating layers of meat and fat (typically 50-60% fat, 40-50% meat) that, when cooked properly, render into an incredibly rich, tender, and flavorful result. Fresh (uncured) pork belly is used in braised dishes, Asian-style preparations (Chinese red-cooked belly, Korean samgyeopsal, Japanese chashu), and increasingly in American restaurants as a standalone protein. Bacon is pork belly that has been cured with salt and sodium nitrite (or celery powder for "uncured" bacon), then usually smoked. The curing process transforms the raw belly into the shelf-stable, sliceable, breakfast-ready product you know.
The Anatomy of Pork Belly
A whole pork belly typically weighs 8-12 pounds and measures roughly 12-18 inches long by 8-12 inches wide and 1.5-2 inches thick. The cross-section reveals the signature layered structure: a skin layer on the outside (if it has not been removed), then a thick fat cap, then alternating thin layers of meat and fat that run horizontally through the slab like geological strata.
This layered structure is what makes pork belly special. The fat layers render during long, slow cooking, basting the meat layers from within and producing a texture that is simultaneously tender, rich, and slightly chewy. No other cut has this architecture. A pork chop has a single layer of fat on the outside. A pork shoulder has marbling distributed throughout. Pork belly has organized layers of fat that act as built-in basting reservoirs.
At the grocery store, pork belly is sold in a few forms: whole slabs (best for braising, roasting, or curing your own bacon), pre-sliced thick strips (sometimes labeled pork belly strips or fresh side pork — good for grilling or pan-frying), and skin-on or skin-off (skin-on is essential for crackling/chicharrones, skin-off is easier for most preparations). Price ranges from $3-7 per pound for conventional and $6-12 for heritage breed or Berkshire pork belly.
How Bacon Is Made: Curing and Smoking
Commercial bacon production follows three steps: curing, smoking, and slicing. The curing step is what transforms perishable raw pork belly into shelf-stable bacon.
Wet cure (the most common commercial method): the belly is injected with or submerged in a brine containing salt, sugar, sodium nitrite (the curing agent that gives bacon its pink color and characteristic cured flavor, and inhibits botulism), and often flavoring agents (maple, black pepper, garlic). The cure typically takes 3-7 days under refrigeration. Sodium nitrite is the critical ingredient — it provides the cured flavor, the pink color, and the food safety protection. Without nitrite, you have salt pork, not bacon.
Dry cure: salt, sugar, and nitrite are rubbed directly onto the surface of the belly (no liquid brine). The salt draws moisture out of the meat through osmosis, the cure penetrates over 5-14 days, and the belly loses 15-25% of its weight in water. Dry-cured bacon has a more concentrated flavor, firmer texture, and less water (which means less shrinkage in the pan). Artisan and heritage bacon producers typically dry-cure.
After curing, the belly is smoked (usually with applewood, hickory, or cherrywood) at low temperatures (100-130°F for cold smoking, 200-275°F for hot smoking). Cold smoking imparts smoke flavor without cooking the meat. Hot smoking partially cooks it. Most commercial bacon is cold-smoked, then sliced and packaged.
The "uncured" bacon label is misleading. By USDA regulation, bacon cured with sodium nitrite is labeled "cured." Bacon cured with celery powder (which contains naturally occurring nitrates that convert to nitrite during processing) is labeled "uncured" even though the chemical process is identical. The nitrite content is often the same or higher in "uncured" bacon. The label does not mean the bacon was made without curing agents — it means the curing agents came from a plant source rather than being added directly.
Cooking Fresh Pork Belly: Braised, Roasted, and Grilled
For braising (the most forgiving method): cut the belly into 2-3 inch cubes or leave it as a whole slab. Sear all sides in a hot pan until golden brown. Transfer to a Dutch oven with braising liquid (soy sauce, rice wine, sugar, ginger, and star anise for Chinese-style; beer, onions, and mustard for German-style; or dashi, mirin, and soy for Japanese chashu). Cover and braise at 300°F for 2.5-3 hours until a chopstick slides through with no resistance. The fat renders, the collagen converts to gelatin, and the meat becomes impossibly tender.
For crispy roasted belly: score the skin in a crosshatch pattern (this helps the fat render and the skin crisp). Rub the flesh side with salt and spices. Place skin-side up on a rack over a sheet pan. Roast at 275°F for 2.5-3 hours until the meat is tender, then blast at 450-500°F for 15-20 minutes to puff and crisp the skin. The result is what the British call crackling and the Filipinos call lechon kawali — shatteringly crispy skin over meltingly tender meat. ButcherIQ has a pork belly cooking calculator that adjusts time and temperature based on the thickness and weight of your specific slab.
Cooking Bacon: Beyond the Frying Pan
The oven method produces the most consistent bacon with the least mess. Lay strips on a sheet pan lined with parchment paper or a wire rack. Place in a cold oven (not preheated), then set to 400°F. Bake for 18-22 minutes until the desired crispness. Starting in a cold oven allows the fat to render gradually, producing evenly cooked bacon without the curling and splattering of pan frying.
For thick-cut bacon: lower the oven to 375°F and extend the time to 22-28 minutes. Thick bacon benefits from the slower render — rushing it at high heat gives you burnt edges and chewy centers.
For candied bacon: sprinkle brown sugar and black pepper on the strips before baking. The sugar caramelizes as the bacon cooks, creating a sweet-savory-smoky combination that is legitimately addictive. Add cayenne if you want heat.