Preheat the oven to 320°F/160°C.
In a food processor, put sugar, honey, eggs, oil, orange zest, and salt. Process to a uniform mixture (about 30 seconds).
Mix baking powder and flour thoroughly, then add to the mixer, processing for a few seconds to combine.
Carefully pour the boiling tea while the motor is running (through the sleeve of the lid) and process for just another few seconds to a uniform mixture.
Pour into the greased pans (batter is going to be very runny).
Bake for 45-60 minutes until the cake is puffed and browned and a toothpick inserted in the middle comes out with a few crumbs.
Let the cake cool completely, and dust with powdered sugar (optional).
Keep refrigerated for up to 5 days. It will be finished for sure long before that!