US Energy Initiatives Corp (USEI)

[thermal164]

According to this portion of the story you listed edibles are legal in Washington:
Washington state regulators on Wednesday approved the sale of cannabis-infused treats by marijuana dispensaries, with one exception: nothing that may appeal strongly to kids.

"There are no bans except those products that may be 'especially' appealing to children," Brian Smith, communications director for the state Liquor Control Board, told The Huffington Post. "The key word is 'especially.' We recognize that there are some products that adults and children may like. However, there are some products on the medical market now that a reasonable person would say are especially appealing to kids."

This means foods like brownies, cookies or other baked goods may be more likely to be approved by the board, while items like candies or lollipops may face more difficulty getting approved.