In a small bowl, combine the black pepper, cayenne pepper, celery seed, ground cinnamon, ground cloves, ground ginger, ground dry mustard, nutmeg, paprika, and salt.
Mix all the ingredients together thoroughly, ensuring that they are evenly distributed.
Once well-mixed, transfer the seasoning blend to an airtight container, such as a spice jar or a glass container with a tight-fitting lid.
Store the Homemade Old Bay Seasoning in a cool, dry place away from direct sunlight. It should stay fresh for several months.