1 cube margarine
1 cup sugar
1 Tbl. water
1 tsp. salt
2 tsp. vinegar
1/2 cup corn syrup
Melt all together in medium-size saucepan over medium-heat the whole time. If using candy thermometer, cook to barely-above 100 degrees C. (Don't let it reach 220 degrees F.) If using digital thermometer, cook to 226 degrees.
Remove from heat and stir in desired food coloring.
Pour over 5 level quarts of popped corn. Stir to coat completely.
Wait a minute or so before forming into balls, as hot candy will not set up as well. Use wet hands to form into balls and put in plastic bags.