Technically, yes, though it may not taste great in some cases. Also, certain varieties of MUD\\WTR contain caffeine, so we recommend being aware of how much you’ll be consuming if you mix it with regular coffee. If you’re looking for a mushroom product to add to your favorite coffee, we recommend MUD\\WTR’s Mushroom Boost mix-in or ReNude Chagaccino instead. They don’t have “base beverages” in them that can alter your coffee’s flavor.