In a large microwave container, add 8-10 cubes (each cube equals a little less than 1 ouncof the
Add in Argan oil.
Add in the whipped soap base and glycerin. Mix on low with a hand or stand mixer for 1 minute. Mix on high until mixture begins to thicken and is light and fluffy, much like frosting.
Fold in half of the cornstarch.
Mix in essential oils and cosmetic glitter. Beat for 1 more minute. If the mixture is not beginning to form stiff peaks like a meringue, add more cornstarch, 1 teaspoon at a time until it does.
Divide whipped soap into 3 small mixing bowls and add blue color to one bowl, purple to another and teal to the last bowl. Start with 1-2 drops of color and mix it in. If you want a darker color, add 1-2 more drops and repeat until you get the color you want.
Add one of each color frosting to each of the 3 piping bags. Hold bags together so all sides of the tips meet.
Holding all three bags tightly in your dominant hand and pipe the frosting into your Mason Jar. Top with sprinkles if desired