Super Soft Burger Buns

Name: Super Soft Burger Buns
Prep time: 15 min
Cook time: 15 min
Total time: 30 min
Cuisine: American
Ingredients: ¼ cup warm milk (60 grams ); 1 ⅓ cup warm water (315 grams); 1 tablespoon instant yeast (12 grams); 1 ½ tablespoons sugar (22 grams); 1 large egg (50 grams); 2 teaspoons salt (12 grams ); 4 ¼ cups all-purpose flour (530 grams ); ¼ cup softened butter (55 grams ); 1 egg; 1 tablespoon water; Sesame seeds (optional)