Put the one Sil Pat on the cookie sheet and put in a 300 degree oven keep warm
Combine Berry Blue Jello, 2/3 cup sugar, 2 Tablespoons Karo syrup, 1 cup water in saucepan with candy thermometer.
Heat over medium-high heat, stirring constantly with wooden spoon
Once the mixture boils, keep an eye on the temperature, stirring occasionally.
Once the mixture has reached hard ball stage, remove from heat.
Remove cookie sheet from oven and add the popcorn
Pour Jello mixture and stir to coat
Set aside to cool completely
Wash saucepan and dry completely