Divide ingredients into thirds
To a saucepan add 1 cup sugar, 1/3 cup corn syrup, 1 1/2 Tbsp. butter, 1/2 tsp. salt, 1/4 tsp. cream of tartar. Stir to combine and continue to stir until the mixture reaches a boil.
Cook to about 235F without stirring, don’t let the mixture start to change color.
Remove from heat and let the mixture stop boiling, add your desired flavoring and color.
Add baking soda and stir, quickly add to 1/3 of the popcorn and mix gently with a wooden spoon to coat popcorn.
Spread out onto a greased cookie sheet. Break into pieces when cooled.
Repeat twice more adding different colors and flavors.