1/8 teaspoonlemon oil or 1/4 teaspoon fine lemon zest (not lemon extract)
Instructions
Cream the margarine and shortening until fluffy.
Add the salt and powdered sugar slowly. You can add a little of the dairy-free milk as you are trying to mix in all the powdered sugar if things get too thick.
Once all the powdered sugar is mixed in, you can start adding dairy-free milk until you get the frosting thickness you want. Sometimes I like it dense, sometimes I like it fluffy and mousse-like.