1 cup (200 grams) granulated sugar, divided5 tablespoons (70 grams) unsalted butter, melted (110°F/43°C to 115°F/46°C)1 tablespoon (6 grams) plus 1 teaspoon orange zest, dividedYeasted Rough Puff Pastry Dough (recipe follows)
Spray a 9×5-inch loaf pan with baking spray with fl our. Line pan with parchment paper.
In the bowl of a stand mixer fitted with the paddle attachment, beat ¾ cup (150 grams) sugar, melted butter, and 1 tablespoon (6 grams) orange zest at medium speed until light and fluffy.
On a lightly floured surface, roll Yeasted Rough Puff Pastry Dough into a 20¾x18½-inch rectangle. (If dough feels too soft, wrap in plastic wrap and freeze for 10 to 15 minutes before continuing.) Using a pizza cutter or sharp knife, trim ¼ inch from all sides to create a 20¼x18-inch rectangle. Using a small offset spatula, spread sugar mixture onto dough. Using a pizza cutter or sharp knife, cut dough into 27 (6×2¼-inch) rectangles.
Carefully stack 3 rectangles on top of each other, staggering short sides by about ½ inch. Roll dough into a coil, and tuck ends under, pushing center up slightly (about 1/8 inch). Place in prepared pan. Repeat with remaining dough. Loosely cover with a piece of greased plastic wrap. (Do not secure plastic wrap; you don’t want any weight or pressure on proofed dough.) Let rise in warm, draft-free place (75°F/24°C) until very puffed and dough jiggles slightly when pan is shaken, about 1½ hours.
Preheat oven to 425°F (220°C). Place a piece of foil on bottom rack of oven to catch any dripping butter.
Place loaf in oven.
Immediately reduce oven temperature to 350°F (180°C), and bake until golden brown and an instant-read thermometer inserted in center registers 210°F (99°C), 1 hour to 1 hour and 10 minutes, covering with foil during final 25 minutes of baking to prevent excess browning. Let cool in pan for 10 minutes. Carefully remove from pan, and let cool on a wire rack for 10 minutes.
In a small bowl, whisk together remaining ¼ cup (50 grams) sugar and remaining 1 teaspoon orange zest until well combined; sprinkle sugar mixture onto loaf. Serve warm, or let cool completely. Store in airtight container for up to 3 days.