Oaxacan Chocolate Mole Crockpot Beef: Rich & Smoky

This Oaxacan chocolate mole Crockpot beef turns a handful of bold pantry ingredients into a deeply satisfying dinner. A chuck roast simmers all day in a sauce made from roasted mulato and pasilla chilies, Mexican cinnamon chocolate, and toasted sesame seeds.

The result is rich, smoky, and faintly sweet, with a velvety texture that clings to every shred of beef. Serve it in warm corn tortillas with a sprinkle of sesame for a meal that feels special but comes together with almost no effort.

Mole negro is one of Mexico's most celebrated sauces, traditionally made with dozens of ingredients and hours of stirring. This version captures that same depth using a shortcut: a good-quality mole paste and a slow cooker.

The beef chuck breaks down over eight hours, absorbing the complex flavors of chocolate and chilies while staying moist and tender. The sauce thickens naturally as it cooks, creating a glossy, ebony coating that is perfect for tacos, over rice, or alongside beans. This is an easy, hands-off way to bring Oaxacan flavor to a weeknight table.

Ingredients

Why this recipe works

Slow cooking is the key to this dish. Chuck roast is a well-marbled cut that needs low, steady heat to break down its collagen into gelatin, which makes the meat fork-tender and gives the sauce body.

The long simmer also allows the mole paste to hydrate and meld with the chocolate and broth, developing a rounded, complex flavor that would be hard to achieve in a quick stovetop sauce. By cooking on LOW for eight hours, the beef stays moist and the sauce reduces to the perfect consistency without scorching.

The combination of chocolate and chilies is what makes mole negro distinctive. The Mexican cinnamon chocolate adds a subtle sweetness and a hint of spice, while the mulato and pasilla chilies bring smokiness and a gentle heat. Toasted sesame seeds contribute a nutty undertone that rounds out the sauce. Because the ingredients are layered in the Crockpot and left to meld, the flavors have time to marry, resulting in a sauce that tastes far more complex than the sum of its parts.

Notes and substitutions

Look for a mole paste that lists mulato and pasilla chilies as the first ingredients; these are the classic chilies for mole negro. The paste is usually sold in jars or tubs in the Latin foods aisle. If it is very thick, you can thin it with a little extra broth.

Mexican cinnamon chocolate, often sold as discs, is available in many supermarkets; it is made with cinnamon and sometimes a hint of vanilla. If you cannot find it, use a good-quality dark chocolate and add ground cinnamon to taste.

For the broth, use beef broth for a richer flavor or chicken broth for a lighter sauce. The amount of broth can be adjusted slightly if you prefer a thicker or thinner sauce, but keep the ratio close to the recipe for the best texture. The sesame seeds are toasted in the video, but you can toast them at home in a dry skillet for a few minutes until fragrant. Serve with warm corn tortillas; flour tortillas also work, but corn is more traditional.

• Mexican cinnamon chocolate: 1 oz dark chocolate (70% cacao) plus 1/2 teaspoon ground cinnamon
• Roasted mulato-pasilla chili mole paste: 1 cup store-bought mole negro paste (look for one with mulato and pasilla chilies)
• Rich broth: Beef broth, chicken broth, or vegetable broth

Equipment

• Crockpot or slow cooker (6-quart)
• Tongs
• Two forks for shredding
• Measuring cups and spoons
• Small bowl for sesame seeds