Question: how much water for 2 cups quinoa?
Answer: It's just too much water, and will leave you with mush. Cook instead with a 1 part grain to 1.5 parts liquid ratio. For the purposes of this post, that would be 2 cups quinoa to 3 cups liquid. As for the liquid, you can use broth, vegetable juice, water, or any combination of those to achieve to taste you want.