Pour water into a small pot, heat it to boiling, add black tea, cook for about one minute, and then pour it into a cup;
Pour coffee powder into hot black tea water and stir well. The ratio of coffee to black tea is1:1;
Finally, add the right amount of milk and sugar according to your own taste.
If it is summer, you can mix iced black tea with iced coffee, and the taste will be different.