• ½cup/130 grams whole milk
• 3tablespoons sugar
• 1(¼-ounce) packet active dry yeast (7 grams; 2¼ teaspoons)
• 2⅓cups/303 grams all-purpose flour, plus more for rolling
• 1teaspoon fine salt
• 3tablespoons cold unsalted butter, cut into cubes, plus more for the bowl
• 1large egg
• White sesame seeds, for sprinkling
• ¼cup/60 grams grapeseed or canola oil
• 2bunches scallions, trimmed, thick ones halved lengthwise, very thinly sliced
• 1teaspoon fine salt

For the Buns

• ½cup/130 grams whole milk
• 3tablespoons sugar
• 1(¼-ounce) packet active dry yeast (7 grams; 2¼ teaspoons)
• 2⅓cups/303 grams all-purpose flour, plus more for rolling
• 1teaspoon fine salt
• 3tablespoons cold unsalted butter, cut into cubes, plus more for the bowl
• 1large egg
• White sesame seeds, for sprinkling

For the Buns

• ¼cup/60 grams grapeseed or canola oil
• 2bunches scallions, trimmed, thick ones halved lengthwise, very thinly sliced
• 1teaspoon fine salt