To make your own vanilla extract:
200 g vanilla beans, split and cut in 1 inch pieces
375 mL 95 % alcohol
375 mL water
250 mL water to rinse beans after filtration
1 year
This will make double strength vanilla, sometimes called "Baker's Vanilla". The vanilla beans can be sourced over the internet (I found mine on eBay). They should be pliant and have an oily surface. Extra beans should be vacuum packed and stored in a cool, dark place. If you don't have access to 95 % alcohol, use a high proof vodka or other neutral spirit. The idea here is to extract 200 g of beans with a liter of alcohol at 35 % concentration final. For an 80 proof vodka (40 %), I would use 200 g beans, 875 mL of vodka and rinse with 125 mL of water. The beans should be covered with liquid in an air tight jar. The jar should be stored in the dark (I used the floor of a closet) and shaken occasionally. After six months, the extract will be marginal (IMHO). It will improve over a year and up to two. It is not a fast process. To test the extract put one drop in a spoonful of milk; the extract itself tastes horrible (don't ask me how I know ). It can then be filtered through a coffee filter paper and bottled in amber bottles.
My friends and family that bake will be getting bottles as presents this year, shhh - don't tell them. If you start now you will have a wonderful homemade present to give them next year to go along with your sausages and baked goods. Beans bought at a good price will of course lead to a cost savings. There is nothing wrong with a good quality of vanilla extract available commerically, I just thought forum members might be interested in making their own.