80% Hydration - Bread Dough Recipe - Soft Milk Bread

Behind the recipe is a lot of hard work. In this stage, liquid 80% hydration level based on flour weight. I started making my own experiment these dough a several years ago. It's easily the best soft bread I've ever tasted! Makes 1818g each, optionalIngredients(A)120g, 1/2 cup cold milk20g granulated sugar1 tsp, 4g dried yeast1/4 tsp salt160g bread flour(B)15g salted butter, in room temperature