Homemade Vanilla Extract is hands down better quality and more cost efficient than anything you can buy at the store. Easily made with just two ingredients (vanilla beans and alcohol) it's worth making at home. After making it for years at restaurants and at home, I've picked up a lot of tips throughout the way. The recipe shared here is the bare minimum information you need, but please refer to the body of the post as there is a lot of questions covered there.
Find it online: https://everydaypie.com/homemade-vanilla-extract/