Why choose real vanilla.

Most candies, cheap chocolates and cookies, baking mixes, and even Toll House Chocolate Chips contain vanillin, or "artificial/imitation vanilla flavor":

Artificial vanilla flavoring is a solution of pure vanillin, usually of synthetic origin.

Synthetic vanillin became significantly more available in the 1930s, when production from clove oil was supplanted by production from the lignin-containing waste produced by the Sulfite pulping process for preparing wood pulp for the paper industry. By 1981, a single pulp and paper mill in Ontario supplied 60% of the world market for synthetic vanillin. However, subsequent developments in the wood pulp industry have made its lignin wastes less attractive as a raw material for vanillin synthesis. While some vanillin is still made from lignin wastes, most synthetic vanillin is today synthesized in a two-step process from the petrochemical precursors guaiacol and glyoxylic acid. (from Wikipedia)