One sip of this will take you back to the rhubarb and custard sweets of your childhood! Gizzi's recipe for Rhubarb & Vanilla Cordial not only makes for a delicious drink but is a fantastic way to use up and preserve any leftover rhubarb at the end of the season. A bottle will make up to 25 servings, so it's perfect to leave in the fridge and bring out on a hot day. Top it up with sparkling water or Prosecco for a fizzy, summery sweet treat.