Starting on June 1, sales of candy and gum will be subject to the state sales tax -- part of the nearly $800 million tax package approved by the Legislature this year.

But not all candy, as Jason Mercier details at the Washington Policy Center blog.

Basically, sweets containing flour aren't taxable.

State law defines candy as "a preparation of sugar, honey, or other natural or artificial sweeteners combined with chocolate, fruits, nuts, or other ingredients or flavorings and formed into bars, drops, or pieces."

The state Department of Revenue goes on to note "Candy does not require refrigeration. Candy does not include any preparation containing flour."

And if you really want to know why, "flour is made from grain such as wheat, rice, corn, rye, oats, and barley. Flour does not include flour substitutes, such as starch. Any product that lists flour as an ingredient on the nutritional facts label is not taxable as candy."

Examples of what's not taxable: licorice whips, Wonka Bars and Nestle's Crunch. You can check if your favorite candy, depending on how you define it, is on the state list at the Department of Revenue website.