1 c. butter
1/2 c. light corn syrup
1 1/2 c. sugar
4 qts. salted popcorn
1 tsp. vanilla

In large bowl combine butter, syrup and sugar. Microwave on High 9 to 15 minutes or until brittle (hard crack) threads form when small amount is dropped in cold water, stirring every 3 minutes. In buttered container combine corn (popped) and salt. Stir vanilla into cooked syrup and immediately pour over corn. Stir until coated. Spread mixture onto large (or two smaller) roasting pan and bake approximately 30 to 40 minutes, stirring occasionally in 250 degree oven. Spread on wax paper to cool.