Fill the lower, larger teapot with water up to the level where the spout joins the teapot. Bring it to a boil.
Once it boils, pour some of the boiling water into the upper, smaller teapot, filling it to the level where the spout joins the teapot. Add the loose tea leaves and put the lid on.
Top up the lower teapot with water, place it back on the stove, and set the upper teapot on top.
Let the water in the lower teapot come to a boil again. Once it boils, turn off the heat completely. Let the teapots rest for about 10 minutes.
Remove the lid of the upper teapot and check whether the tea leaves have swollen and mostly settled at the bottom. The tea should have a beautiful reddish-brown color. A few leaves floating on top are perfectly fine. If there are still lots of leaves on the surface, let it sit a little longer.
Pour some brewed tea from the upper teapot into a Turkish tea glass, usually filling it a little less than halfway. Top it up with hot water from the lower teapot. Adjust the amount of brewed tea to make it as strong or light as you like. (see Note 4)
Keep the teapots on the lowest heat while serving so the tea stays hot. In Türkiye, we rarely stop at one glass! It's common to have two, three, or even more, refilling our glasses as we go.
Serve with sugar cubes or granulated sugar and thin lemon slices on the side so everyone can add some to their tea if they like.