Brioche Bread

Ingredients

• 1 large egg
• 1 packet or 2 1/4 tsp. active dry yeast
• 1/2 c. milk, lukewarm
• 1 tbsp. water
• 2 tsp. kosher salt
• Kosher or sea salt, for sprinkling
• 1 c. butter, softened, plus more for pans
• 1 c. all-purpose flour
• 1/2 c. granulated sugar
• 6 large eggs, room temperature
• 3 c. all-purpose flour