- In a small saucepan, heat the milk and 1 teaspoon cane sugar until it reaches 95-110°F (it should feel warm to your finger, not hot.) 
- While the milk is warming, place the gfJules Flour and salt in the bowl of a stand mixer. Whisk on low to combine. 
- Once the milk is warm, add the yeast and gently stir. Allow the yeast to rest 5-10 minutes until it is bubbly and frothy. 
- Meanwhile, line a baking sheet with parchment paper. The baking sheet should be small enough to fit into your freezer. 
- Once frothy, add the yeast/milk mixture to the mixing bowl along with the melted butter. Mix the batter on low for 1-2 minutes. Scrape down the sides of the bowl and continue to mix the dough on medium-low for 2-3 more minutes. 
- Form the dough into a ball in the middle of the bowl. Cover and allow the dough to rest for 10 minutes while you gather the tools for the boil and work surface. 
- Lightly flour a work surface with more gfJules Flour. You don’t want too much flour, just enough to prevent the dough from sticking. Use a bench scraper or knife to divide the dough into 6 equal portions. Lightly flour your hands and roll each portion into a smooth, tight ball. Place each bun on the baking sheet. 
- Oil a piece of plastic wrap and cover the buns. Allow them to proof in a warm location for about 45 minutes or until they are about double in size. 
- Once the buns have proofed, transfer them to the freezer for 10 minutes. 
- Meanwhile, preheat the oven to 395°F (convection -- preferred) or 425°F (static – buns will not get as dark). In a deep saucepan, bring 7 cups of water to a boil then add baking soda, 1 tablespoon at a time. 
- Remove the buns from the freezer. Working one at a time, place each bun into the boiling water and allow it to boil for 25-30 seconds, flipping the bun about halfway through. Using a slotted spoon, transfer the bun back to the lined baking sheet. Repeat until all the buns have been boiled. 
- Whisk together the egg yolk and 1 teaspoon water, then brush over each bun. Use a sharp knife to make an X score on top of each bun. Sprinkle with flakey sea salt, if desired. 
- Bake for 18-20 minutes on the top rack of your oven (not too close to the heating element, though). The internal temperature of the buns should be 205°F and they should be deeply browned on the tops. If baking on a static (not convection setting) the buns may take slightly longer to bake. 
- Allow the buns to cool completely before storing in an airtight container.