Add yeast, sugar and warm milk to mixing bowl. Stir and let rest until foamy, about 5 minutes.
Mix flour and salt in separate bowl.
Add egg and melted butter to milk mixture and mix.
Slowly add the flour mixture to the mixer until combined using the dough hook.
Mix on medium until dough pulls away from the sides of the bowl, about 6 minutes. Dough will be smooth, elasticity and a little sticky.
Transfer dough to an oiled bowl , cover with plastic wrap and wait about an hour until double in size. See notes for a quicker option.
Turn proofed dough out onto your clean countertop and cut into 104 g rounds. see notes Roll into balls, hands should be in the shape of a c to cup the balls to create a good bun. see video
Place buns on a parchment paper lined cookie sheet. Press down bun a little to flatten into shape. Cover with plastic for about 30 min.
Preheat oven to 350℉.
Bake for 20 minutes until golden brown.
Remove from oven and allow to cool on wire rack. see notes