Black Sesame Melon Pan

Name: Black Sesame Melon Pan
Ingredients: 3 cups (375 g) bread flour, divided; ⅓ cup plus 3 Tbsp. whole milk; 2 large eggs; ¼ cup (50 g) granulated sugar; 3 Tbsp. heavy cream; 2¼ tsp. active dry yeast; 1½ tsp. Diamond Crystal or 1 tsp. Morton kosher salt; 3 Tbsp. unsalted butter, cut into ½ pieces, room temperature; Nonstick vegetable oil spray or vegetable oil (for bowl); ⅓ cup (50 g) black sesame seeds; 1 cup (110 g) powdered sugar; 6 Tbsp. unsalted butter, room temperature; 1 large egg; 1 tsp. vanilla extract; 2 cups (230 g) cake flour, sifted; ½ tsp. baking powder; ¼ tsp. kosher salt; All-purpose flour (for surface); ½ cup (100 g) granulated sugar; A spice mill and a 3¼-diameter cutter