In the "Add a pinch of sugar" thread, many of you mentioned other things you like to add to boost the flavor in your dishes - MSG, tomato powder, soy sauce, etc. What's an ingredient you find that you love to add to dishes to improve the flavor (or aroma, texture, or maybe even the way it looks)?

I am a big fan of mushroom powder. It adds a nice boost of umami with some additional flavor that comes along for the ride. Just throw some dried mushrooms into a spice grinder and grind until powder.