Add the cornflour, rice flour, salt, xanthan gum and cream of tartar to a medium saucepan.
Pour in the water, vegetable oil and food colouring. Stir until well combined.
Cook over low to medium heat, stirring continuously, until the mixture thickens and forms a ball.
Remove from the heat and allow to cool until safe to handle.
Knead while the dough is still warm, until smooth and pliable. I use rice flour on my counter top and on my hands as the dough can be quite sticky when it's warm. I keep kneading and flouring until the dough has cooled and has a good playdough texture!Put water in the saucepan asap to make clean up easier!
Notes
Use ingredients verified as gluten free and clean utensils to avoid cross-contact.
If the dough is sticky, knead in a little gluten-free cornflour or rice flour.
If the dough is crumbly, add a few drops of water.
Store in an airtight container between uses.
This playdough is not edible. Supervise children during play.