Combine 350 grams of all purpose flour, 1 envelope of fast acting yeast (7 grams), 65 grams of granulated sugar and 1 teaspoon of salt in a large bowl or the bowl of a stand mixer
Add 160 ml of warm whole milk, 42 grams of melted butter and 1 large egg to the cooled tangzhong and whisk to combine
Add the tangzhong mixture to the flour mixture and mix until a loose dough forms
Knead by hand in the bowl until the dough feels smooth and not too sticky (add a pinch of flour if necessary)
If kneading by hand, transfer to a lightly floured surface. If using a stand mixer, attach the dough hook. Knead for 6-8 minutes or until the dough is smooth and elastic
Transfer the dough into a large lightly oiled glass bowl and turn the dough over a few times to ensure that the outer surface is lightly oiled
Cover the bowl with plastic wrap or a kitchen towel and rest in a warm place for about 60-90 minutes or until the dough has doubled in volume
Transfer the dough onto a lightly floured work surface and divide into four equal portions
Roll each portion into a round ball. Roll each ball into a ten inch long oval and fold one end into the middle, fold the opposite end over the top and roll the dough up as you would a cinnamon roll (see photos above)
Do this with all four portions and place them side by side in a buttered and parchment lined 9"x5" bread pan
Cover the pan with a towel and allow the dough to rest until the dough puffs up to the top of the bread pan (30-45 minutes)
Preheat the oven to 350 degrees
Whisk 1 egg with 1 tablespoon of whole milk and brush it gently over the puffed dough
Bake on a middle rack at 350 degrees for 40-50 minutes (cover with foil if the top surface is browning too much)
Once the crust is golden brown and the center of the loaf reaches 190 degrees, transfer the loaf pan onto a cooling rack for 15 minutes before transferring the dough directly onto the cooling rack. Allow the bread to cool fully before cutting
Brush warm loaf with melted butter or the honey butter glaze (optional)
Store at room temperature in an airtight container