I need to make french vanilla bc. I can't find fv extract. How do I add creamer to my bc for the flavor? If I'm using liquid creamer would I add the amount that I would use for extract?

The amount of extract in a b/c recipe is usually only a tsp. or two.... hardly enough to make a discernible difference.

You can use your liquid creamer to replace part of the liquid called for in the b/c recipe.

However, since the creamers are loaded with either sugar or corn syrup; your b/c will be a tad sweeter than usual.

National Flavors carries French vanilla:

http://www.nationalflavors.com/products.htm#vanilla

HTH