Keurig brewers are designed to brew 1 cup of coffee, tea or hot cocoa at a time. To use your Keurig brewer, insert a sealed cup of coffee, tea or hot-cocoa mix, called a "K-cup," into the machine and press the appropriate button for the size of your cup. If you would like to brew iced tea, buy a K-cup made especially for cold brewing. These cups contain more coffee or tea so that your beverage doesn't become as watered down when the ice melts.
Push the power button on the Keurig brewer. Wait for the "Ready to Brew" message to appear on the screen.
Open the lid of the Keurig brewer and insert the K-cup for iced tea. Close the lid. Place your mug on the drip tray.
Press the button for the size of mug you are using. You will pour the tea over ice, so you will end up with a larger glass of iced tea than the mug of hot tea you are brewing. For example, if you select the 6- to 8-oz., or "Large" cup, setting on your Keurig brewer, you will have a 10- to 12-oz. glass of tea once you pour it over ice in a large glass.
Wait for the Keurig brewer to stop brewing. Remove the mug of hot tea from the drip tray and pour the tea into the glass filled with ice.
Add sugar and lemon to taste.