This versatile Tone's Onion Salt 4.23-ounce spice blend is perfect for so many uses: sprinkle on meats before grilling or broiling, blend into dressings, chicken salads and meatloaf. Or add to marinades and soups for extract flavor impact. Established in 1873, ToneâÂÂs is the oldest spice brand in America whose focus on delivering quality spices at a value has stood the test of time. Tone's onion salt is made from a single onion spice. This plastic bottle of Tone's Onion Salt is shelf-stable.