bread flour (about 300g) • granulated sugar (about 15g) • salt (about 3g) • milk (about 100g) • water (about 85-95g) • Ruby Black Tea powder (about 5g) • unsalted butter (about 20g) • yeast (about 3g) • unsalted butter (about 70g) • powdered sugar (about 35g) • beaten egg (about 20g) • milk powder (about 90g) •