In a large bowl, combine warm water, brown sugar and dry active yeast. Stir to combine and let sit about 5 mins until foamy. Add flour & salt and mix together, transferring to a floured surface once the dough begins to come together to knead and form a dough ball.
Transfer dough into an oiled bowl and cover with a towel. Let it rise on the countertop for about 1-2 hrs, until doubled in size.
Remove risen dough from bowl and cut into 6-8 equal pieces. Form into logs and lay onto a parchment lined baking sheet. Cover with a damp towel to let rise for 30 mins.
While the buns are rising, prepare your poaching water by adding 3/4 cup baking soda to about 10 cups simmering water.
Poach buns 2 at a time for 1 min each side. Remove from pot and let drip dry in the slotted spoon or spider you’re using to remove them before placing them back on the baking sheet.
Coat in egg wash and score three lines over the top. Sprinkle with course salt and bake at 425 F for 10-15 mins until golden brown.
Slice down the middle to serve and enjoy!