2 cups all purpose flour
1 cup salt
2 1/2 tsp cream of tartar
1 tbs vegetable oil
In a medium pot, whisk together dry ingredients. Stir in water and oil. Place over medium heat and stir with a heavy wooden spoon, scraping the bottom and sides. Cook about five minutes, until dough comes together and is thick and stiff.
Transfer to an electric mixer fitted with a dough hook and knead until smooth and workably cool. Divide into four equal parts. Add 6 or more drops of food colouring to each portion. Wearing disposable gloves and working on a non-staining surface such as a Silpat mat, knead colour into each ball of dough. Store in airtight containers.