Mix flour and yeast in a stand mixer fitted with a dough hook attachment on medium low speed. Slowly, add in half of the water. Once combined, add 1 ½ cups (368 grams) BIGA and mix.
Slowly, add in the remaining water, and mix until the dough looks cohesive.
Add powdered milk; mix until combined.
Slowly, add honey, allowing the flour to absorb the honey before adding in more. You can use a silicone spatula to flip the dough over periodically to help the dough hook catch and knead the honey.
Add whisked egg; mix until mostly combined (the egg will continue to knead into the dough). The dough will become loosened at this point.
Bump the mixer to medium speed, and add in butter 1 tablespoon (14 grams) at a time. Allow each piece of butter to beat in, flipping the dough over periodically to help the dough hook catch. Add in fine sea salt; mix until combined.
Bump the mixer speed up to high and mix until you hear a popping sound and the dough wraps around the dough hook. Flip the dough as needed to ensure all of the ingredients are fully mixed (this is when the dough finally comes together). The dough will be smooth and very sticky.
Roll the dough into a tight ball, then place in a mixing bowl. Cover with plastic wrap, and allow to rise in a warm, draft-free place until doubled in size, about 30–60 minutes. Rise time will vary depending on the temperature of your environment.
Generously, dust a work surface with bread flour and roll the dough into a rectangle about ½ inch (1–2 cm) thick. Use a 3 inch (7 cm) circle cookie cutter to cut about 16 rolls from the dough. Place the rolls on a light colored baking sheet lined with parchment paper at least 3 inches (8 cm) apart. Re-roll the dough and continue cutting rolls until no dough remains.
Lightly, dust the top of the rolls with additional bread flour to ensure nothing sticks to the top. Lightly, cover with plastic wrap and proof in a warm, draft free place until doubled in size, about 30–60 minutes.
Heat oven to 350°F (180°C).
Remove plastic wrap, and bake rolls for 13–16 minutes, rotating halfway through baking, until lightly golden brown.
Place the baking sheet on a cooling rack, and cover with a tea towel. Allow rolls to cool to room temperature.