Slow Cooker Beef Neck Bones and Gravy

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.