1. After the black tea bag is steeped in boiling water for 15 minutes, take out the tea bag and pour out 45g of tea. Do not throw away the tea bag.
2. Separate the egg whites and yolks and put them into clean, water-free and oil-free egg beaters. Add black tea water and salad oil to the egg yolks, draw a "Z" and stir them until there is a layer of fine foam on the surface, that is, the emulsification is complete.
3. Tear open the black tea bag, add the powdered black tea inside to the egg yolk paste, and stir evenly with a manual whisk.
4. Sift in low-gluten flour, draw "Z" and mix well. At this time, the egg yolk paste becomes delicate and smooth.
5. Add powdered sugar to the egg whites in 3 times and beat with an electric whisk until dry and foamy.
6. At this time, the oven can be preheated first, and the upper and lower fires are 170°C. Take 1/3 of the meringue and add it to the egg yolk paste, stir evenly with a rubber spatula.
7. Pour it back into the meringue and continue to mix it with a rubber spatula until no trace of egg white is visible and the batter is smooth and delicate.
8. Pour the cake batter into the mold from a height of 15 cm and shake it twice.
9. Put it into the preheated oven, heat up and down at 150°C, and bake for 30 minutes.
10. After being out of the oven, shake it twice, let it cool on the grill for 5 minutes, and then demould it in a warm state.
11. Cut a piece and enjoy it.
Tips:1. The preheating temperature of the oven can be 15-20℃ higher than the actual baking temperature.
2. The egg-beating bowl containing the egg whites must be clean, free of water and oil.
3. In summer, after the egg whites are well separated, they can be frozen in the refrigerator together with the egg-beating tray, and then take out after the egg yolk paste is made, so that the low-temperature egg whites are easy to beat, and more delicate and stable.
4. When mixing the egg yolk paste and meringue, remember to use the method of mixing, not to draw circles to avoid defoaming.
5. Please adjust the baking time and temperature according to the temper of your own oven.
