Add all the ingredients (mentioned in the list above) in a mixing bowl.
Stir to mix them thoroughly.
Transfer to a dry jar to store them further.
Use a spice blender to break up the larger herbs (before mixing with garlic powder and onion powder).
Notes
Use a spice blender to break down the herbs like rosemary. You can also heat the herbs for a minute on low flame before crushing them. Also, make sure to cool them completely before blending. Don't add salt to the spice blend. Shake it before every use.