Yes! Essential oils can be used in cooking, baking, flavoring smoothies, and whatnot. The only difference is that when it comes to EOs, we're talking about the potency of spice or herb in hand. Take Cinnamon, for example, you can use a whole stick or 1 Tsp powder to get the desired result but in the case of Cinnamon EO you'll just need a drop or 2 and you're all set to go!