Preheat oven to 250 degrees. In large shallow roasting pan, mix
popcorn and peanuts.
In a heavy 2-quart saucepan, cook sugar, syrup and margarine over
medium heat until mixture boils, stirring constantly. Stir in
chocolate. Stirring constantly, cook 5 minutes or until chocolate is
completely melted and mixture is very thick. Remove from heat. Stir in
vanilla. Pour over popcorn. Stir to coat well.
Bake 1 hour, stirring occasionally. Cool in single layer on baking
sheets or foil. Store in tightly covered container.