Avocado Burgers with Chile and Queso Fresco

Name: Avocado Burgers with Chile and Queso Fresco
Ingredients: 6 ounces ground fatty brisket (see Note); 6 ounces ground short rib; 6 ounces ground bottom round; 6 ounces ground chuck; 1 1/2 teaspoons ground coriander; 1 1/2 teaspoons ancho chile powder; 3/4 teaspoon ground cumin; 3/4 teaspoon sweet smoked paprika; 3/4 teaspoon ground oregano; 3/4 teaspoon chipotle chile powder; Kosher salt; 8 ounces queso fresco, crumbled; 4 hamburger buns, split and toasted; 3 tablespoons Mexican crema or sour cream; 1 large avocado—peeled, pitted and thinly sliced; Thinly sliced red onion and cilantro leaves, for serving