- 1 1/2 pounds beef neck bones, or more to taste
- 1 teaspoon ground cumin
- 1 teaspoon ground allspice
- 1 teaspoon ground black pepper
- 1/2 teaspoon red pepper flakes
- 1/2 teaspoon salt
- 1/2 cup all-purpose flour, divided
- 3 tablespoons olive oil
- 3 cloves garlic, minced
- 2 cups beef broth
- 1 onion, sliced into long pieces
- Preheat slow cooker to High.
- Clean neck bones and remove any excess fat. Season bones with cumin, allspice, black pepper, red pepper flakes, and salt; dust with 1/4 cup flour.
- Heat olive oil in a large skillet over medium heat; cook and stir garlic until fragrant, 1 to 2 minutes. Increase heat to medium-high and add seasoned neck bones; cook until bones begin to brown, about 1 minute per side.
- Transfer neck bones and drippings to the preheated slow cooker; add beef broth and onion.
- Cook on High for 1 hour. Reduce heat to Low and cook 4 to 6 hours.
- Transfer neck bones to a dish. Sprinkle remaining flour into the slow cooker and stir well. Return neck bones to slow cooker. Let stand until gravy thickens, 15 to 20 minutes.