Each bag of popped popcorn (3.2 oz) makes 3 mini cauldrons. So, if you make all 3 colors using 1 bag of popcorn for each color, you'll have 9 servings (enough colored popcorn to fill 9 mini cauldrons). This can vary depending on the size of your cauldrons, the amount of chocolate used, etc.
Nutrition information is a rough estimate only; actual values will vary based on the exact ingredients used and amount of recipe prepared.