Wild rice tops the list of high-protein varieties of rice. Each 1-cup cooked serving offers over 6.5 grams of protein. Brown rice isn’t too far behind, however. You’ll get 4.5 to 5 grams of protein from a cup of prepared brown rice. White rice tends to have the least amount of protein. One cup of steamed white rice provides between 4 and 4.5 grams.