Yes! If you want a lighter mashed potato recipe, you can swap the milk and butter in this dish for 1/2 cup of chicken or vegetable broth, or use a bit of our Vegan Cauliflower Cream Sauce. We don't recommend just replacing the milk in this recipe with extra Greek yogurt (it will overpower everything else!), but a bit of cauli cream (or veggie stock!) is a perfect substitute to keep the flavors balanced while still keeping the potatoes soft.