How much cauliflower to make one cup?

To make one cup of cauliflower, you'll need about 1 medium head of cauliflower or approximately 4 ounces of florets. When chopped, this usually yields around 1 cup. If you're using riced cauliflower, it generally takes about 2 to 3 ounces to make one cup, as it compacts more than whole florets.