Add 2 ¾ cups of powdered sugar to a stand-up mixer using the paddle attachment. Add 1 cup of blue frosting. Mix on low, scraping sides as needed, until dough balls up into a playdough consistency. If the mixture is too powdery and is not forming a play dough ball, simply add a teaspoon of frosting and continue to mix.

Remove the ball of blue play dough and set it aside.

Repeat this process by adding 2 ¾ cups of powdered sugar to the now empty stand up mixer. Add 1 cup of pink frosting and mix on low, scraping sides as needed, until a dough ball forms.

Add the blue play dough ball back into the mixer with the pink play dough ball. Set the mixer to low to blend the two colors together. Only mix long enough to mostly incorporate the pink into the blue.