Ahh, McDonald's secret sauce … so zesty on the palate, so testy in the digestive tract. In this video from McDonald's Canada, the chain's executive chef, Dan Coudreaut, shows us how the sauce is made. Once I got past the irony of McDonald's calling one of its employees a chef, I learned that the recipe has been declassified for some time, and that it mainly consists of mayonnaise, sweet pickle relish, yellow mustard, white wine vinegar, garlic powder, onion powder and paprika. Coudreaut mixes up a batch and prepares a version of the Big Mac in a suburban kitchen to underscore, I suppose, that McD's food is non-threatening and just like home cookin'. This clip reminds me of a do-it-yourself primer on bomb making, where everyday store-bought ingredients are used to assemble a deadly explosive device. (Not that I've ever streamed a bomb-making video, no matter what it says in my FBI file.) This video follows another one from the same series that showed why the Quarter-Pounders in ads always look better than the real thing. Frankly, these stabs at transparency seem awfully transparent, little more than marketing gristle on the fatty all-beef patties of sizzling corporate profits, or some overblown fast-food analogy like that. As a consumer, I made my peace with McD's long ago. It's deadly, but it tastes great. Seems like a fair tradeoff to me. Agency: Tribal DDB Toronto.