One vanilla bean is roughly equivalent to about 3 teaspoons vanilla extract, so if you're substituting one for the other, you may only need part of a vanilla bean to make a recipe calling for extract — this said, a little extra vanilla bean generally doesn't hurt! (thekitchn.com)
A little extra vanilla and sea salt helped to join together all the flavours and agave nectar sweetened it just a touch. (glutenfreeveganpantry.com)