Roti Susu Jepang

Bahan-bahan (1 porsi)

• 2 tablespoons air
• 2 tablespoons tepung
• ¼ cup susu
• 1 packet active dry yeast, (2 ¼ teaspoons)
• ⅔ cup warm milk
• ¼ cup gula
• Tangzhong
• 1 large telur
• 3 ¼ cups all-purpose flour
• 1 teaspoon garam
• ¼ cup unsalted butter, (softened)
• 1 egg white
• 1 tablespoon air