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So here's the challenge with this clone recipe: get the right ratios for nearly 20 different spices, and come up with a way to get the same lemony tang that makes the real Mrs. Dash the tasty salt-free seasoning blend we've come to know and love over the years. Sure, we could use powdered citric acid, or sour salt. But then we still need to figure out the "lemon juice solids" part. Ah, but wait, there's citric acid and lemon juice solids in Kool-Aid unsweetened lemonade drink mix. It's perfect! Add a little of that drink powder to the spice blend and we have a clone that in a taste test could fool even Mr. Dash.
Source: Even More Top Secret Recipes by Todd Wilbur.