To Make the Bread: In a small bowl or measuring cup combine warm water, yeast and pinch of granulated sugar. Allow the mixture to sit until foamy, about 5-8 minutes. (If it doesn't get foamy throw it out and start again.)
Meanwhile, in the bowl of a stand mixer fitted with the whisk attachment, sift together bread flour, remaining 1 tablespoon sugar, salt and melted butter. Once the yeast mixture is foamy, add it to the ingredients in the bowl. Switch to the dough hook, knead on medium speed until the dough is smooth and elastic, about 6-8 minutes.
Spray a large bowl with cooking spray. Transfer the dough ball to the bowl. Cover with plastic wrap and let it rise in a warm place for 90 minutes or until doubled in size. Punch it down, then transfer dough to a lightly floured work surface and knead a few times. Cut it in half and gently shape into two 3x6-inch loaves, don't overwork the dough. (The shape will be rectangular)
Place the loaves on a parchment-lined baking sheet and cover with plastic wrap. Let rise in a warm environment until puffy, about 45-60 minutes.
To Make the Cinnamon Sugar: In a shallow bowl or plate, whisk together granulated sugar, brown sugar and cinnamon. In a separate shallow bowl, whisk melted butter and corn syrup until blended.
Line two 8x4-inch loaf pans with parchment paper, leaving an overhang on all sides to lift bread from pan. Uncover bread dough and use a sharp knife to cut four deep slashes across the top of each loaf without cutting all the way through. (The loaves will deflate).
Dip each loaf in the butter-corn syrup mixture, coating it completely. Next, coat evenly with the cinnamon-sugar mixture making sure all crevices are completely saturated. Pour any leftover butter and cinnamon sugar on top.
To Bake: Preheat the oven to 350°F. Bake until golden brown, 25-30 minutes.
Lift the bread out of the loaf pans using the parchment paper overhang and let cool until just warm, about 15-20 minutes.
To Make the Glaze: While the bread cools, in a small bowl, whisk powdered sugar, salt, melted butter and 3 tablespoons milk until smooth. (Whisk in up to 2 more tablespoons of milk if needed to thin out the glaze.)
Drizzle the glaze on the warm loaves or serving any extra on the side for dipping.