Bring water to a boil in a saucepan; remove from heat and set aside.

Mix flour, salt, cream of tartar, and soft drink mix together in a large bowl; stir vegetable oil into flour mixture. Add hot water and continue stirring until dough comes together.

When dough is cool enough to handle, turn it onto a lightly floured surface; knead until smooth and elastic, about 8 minutes. Store unused portions in refrigerator.