Place all ingredients in one of the ziploc bags, close and put it in the next ziploc bag. Give everyone a turn at squishing the bags to mix. Mix until smooth.
Place all ingredients in a sandwich-size plastic Ziploc. Squeeze out all the air. Squish and moosh (under the arm!) the bag until all the ingredients are well mixed and there is a creamy consistency. Add any favorite flavors or other stuff (raisins, M&M's, peanut butter, chopped nuts, etc). Take out a spoon and enjoy.