Preheat the oven to 350 degrees. Add the cupcake liners.
Add the boxed cake mix to a bowl. Mix in the oil, eggs, and soda. Add 1/2-3/4 of the jello.
Put the cupcake batter into the liners about 2/3 full. Bake for 18-20 minutes.
How to Make the Frosting:
Use a mixer and cream the butter for 2 minutes until light and fluffy.
Add in the vanilla and the rest of the jello. Add the salt.
Mix the half and half and the pineapple soda together in a different bowl.
Slowly add the powdered sugar one cup at a time and then add the soda mixture in between each cup. Mix until cream and peaks form. Don't overmix. You can add in the food coloring as well.
Put the frosting in the piping bag and frost the cooled cupcakes. Add the pineapple sugar on top.