Melt the butter in a medium saucepan over medium heat.
¼ Cup (1) Butter
Remove from the heat and stir in the orange zest, spices, and sugars.
½ tsp (1) cinnamon, 1 tsp. finely grated orange zest, pinches ground clove, ¾ Cup (3) Brown Sugar, 1 Cup (200 g) Sugar
Stir in the walnuts and one egg. Allow the filling aside to cool completely.
2 Egg, 3 Cups (351 g) walnuts
Preheat the oven to 350°F, and spray a baking sheet with non stick spray or line a baking sheet with parchment paper.
How to roll out the dough for nut roll
lightly dust the surface with flour and use a rolling pin to roll one half of the dough into a ¼ inch thick rectangle, about 12-by-10 inches.
With the longer side of the dough facing you spread half of the filling over the dough in an even layer, leaving a ½-inch border on the bottom edge.
Roll up the nut roll lengthwise like a jelly roll, covering the filling.
Pinch the edge to seal the edge, and transfer the roll to the baking sheet.
Repeat the process with the second piece of dough and the remaining filling, leaving at least 4 inches between the rolls on the baking sheet. Cover the loaves with a towel and let sit until they are risen slightly, about 35 minutes.
When ready to bake, brush the loaves with the egg wash and poke 5-6 holes with a chopstick all the way through the roll and transfer to the oven.
Bake until evenly golden brown, 35-40 minutes.
Remove and transfer to a rack to cool completely.
Rolls can be sliced and eaten once cooled, but are better the next day. Use a serrated knife to cut the rolls into 1-inch-thick slices.