x3. Selling consumer products in crowded markets is about brand. Even if you somehow came up with the perfect spice mix, your potential customer in the super market pretty much only has the label to go by. Even if no one had your exact blend of spices, how would the buyer know?
You could also consider starting a food blog or cooking channel on Youtube and go over recipes, review foods, and plug your spice mix throughout the content and sell it directly. Just look at the way a successful company like Biotest has marketed their supplements and become a big player in a painfully crowded supp market. They started with staples (whey) and promoted said product via great, free articles that lots of people like to read.