"Vanilla flavor" refers to the taste or smell that is similar to the flavor of vanilla, a sweet and fragrant spice derived from a plant. Full definition
Lightly sweetened crunchy oat and wheat pillows mixed with ground almonds and a touch of natural vanilla flavor. (barbaras.com)
They also have a little hint of vanilla flavor from the vanilla protein powder and a bit of vanilla extract. (macro-chef.com)
It's so completely soft and tender, packed with sweet vanilla flavor in three forms, studded with a mix of juicy roasted berries, and 100 % whole wheat. (brighteyedbaker.com)