Step 1: Ingredients
As long as it's white or light colored, it should work wonderfully.
1/2 c. sugar
1 (8 oz.) pkg. cream cheese, softened (or your lite/fat free variety)
1 tbsp. lemon juice
1/2 tsp. vanilla
Dash of salt
1/4 c. milk
Food Coloring (I have gels)
6 zip style sandwich/snack bags. The snack size is a little easier to control when piping your mix out. You could alternatively layer the colors in a piping bag, and pipe directly into the center of the pan, so each color pushes the others out.
Mix everything: food wise, not literally everything, that could lead to problems; once you have a smooth almost pancake like batter you can move on.
Step 2: Fill your baggies!
You should start by putting your bags into cups or ramekins to make mixing easier.
I used some small ramekins I got at Pier One the other day for $1 a pop, so they are certainly affordable, and you should always have some handy regardless.
I made sure to lay them out in ROY G BIV so I knew what color was next.
I spooned out the filling into each bag separately, so there was an even amount in each one. I went one tablespoon at at a time until I was out.