TopSecretRecipes.com and CopyKat.com both contain recipes for copycat versions of McDonald's sweet tea. While the ingredients used in these recipes vary, the general approach to both recipes is similar.
Both recipes call for water boiled over high heat. Afterward, depending on the recipe, either tea bags or tea bags and sugar are added. At this point, the CopyKat.com recipe calls for steeping the tea for five minutes before pouring it over ice and storing it in the refrigerator. The TopSecretRecipes.com recipe recommends steeping the tea for one hour before removing the tea bags, adding sugar and then pouring the tea over ice.