caramel popcorn

this was one of my favorite treats growing up. last night was the first time i was able to get the proportions just right, so i thought i'd get it down before i forget.
ingredients

1/2 C unpopped popcorn, divided
1/4 C oil
1/4 C butter
1 C brown sugar
1/2 light corn syrup
2/3 C sweetened condensed milk
1/2 t vanilla
pop popcorn in two batches. shake to remove unpopped kernels. pour a little over half into an oversized bowl. in a saucepan, combine butter, sugar and syrup. stir well and bring to a boil over medium heat. stir in milk and stir constantly until mixture comes to soft ball stage. stir in vanilla. pour over popcorn and mix, stirring in remaining popcorn until it's covered to your liking.