I use the Nielsen Massey brand of pure vanilla powder and you can substitute it for pure vanilla extract 1:1 with no difference in taste or texture. It is a great non alcohol version of vanilla. I hope this helps a little.
Thanks so much cami, I am from Malaysia and I am using the Nielson Massey vanilla extract as i used both before in different recipes and if I ran out of either one I thought if it can substitute one for the other. Great answer. Thanks :-)