1Preheat oven to 225 degrees F (110 degrees C). Grease a large baking sheet. Place popped popcorn in a large bowl.
2Combine sugar, corn syrup, and butter in a saucepan; bring to a boil until sugar dissolves, about 3 minutes.
3Combine drink mix and baking soda in a large bowl; pour sugar mixture into drink mixture, stirring carefully. Sugar mixture will bubble. Pour mixture over popcorn; toss to evenly coat. Transfer coated popcorn to baking sheet.
4Bake in the preheated oven, stirring every 10 minutes, until coating has hardened, about 30 minutes. Cool and break popcorn into pieces.
Footnotes
Cook's Note:
Use a baking sheet with a high lip on the edges unless you are fortunate enough to find a full sheet tray. This is what I would have liked.
Ingredients
20 servings
255 cals
6 quarts popped popcorn
2 cups white sugar
1 cup light corn syrup
2/3 cup butter
2 (.13 ounce) envelopes unsweetened soft drink mix, any flavor (such as KOOL-AID®)