First, a word of warning: never, Never, NEVER buy vanilla essence. It’s a nasty chemical substitute for the real thing.
Second: make your own vanilla extract. It is ridiculously simple and involves nothing more than two ingredients. Even the most pure and expensive commercially-produced vanilla extract contains a number of additional elements, including sugar. You don’t need them in your life. What you DO need are two kinds of vanilla extract: made with vodka for a clean vanilla taste, and made with dark rum for a darker, more complex caramel flavour. Experiment with both kinds in your baking and you will soon be turning out cakes so good you would swear they had been made by Mary Berry.
RECIPE – makes 100ml
1 vanilla pod, split lengthways
100ml of vodka or dark rum
It doesn’t get any easier than this: put both halves of the split vanilla pod into a 100ml bottle (the exact size is largely immaterial, anything between 50ml and 120ml will produce perfect vanilla extract). Top up with the vodka or rum, then put the lid on and set it aside for at least a month. It will last for as long as you need it to, but if my experience is anything to go by you will use it up pretty quickly once you discover just how good it is.