Spiced Pumpkin Icebox Cake - granulated sugar

Method

• Special equipment: a 9-inch round cake pan
• Position 2 racks in the center of the oven, and preheat to 400 degrees F. Stir together the granulated sugar and 1 teaspoon of the cinnamon in a small bowl.
• Let the dough rounds soften at room temperature for 10 to 15 minutes, then unroll onto 2 baking sheets.
• Brush both sides of the dough rounds with the melted butter, and sprinkle the tops with the cinnamon sugar.
• Bake the dough rounds, rotating the baking sheets halfway through, until they are light golden brown and crunchy, about 15 minutes.
• Let cool completely on the baking sheets.
• While the dough bakes, spread the walnuts out on another baking sheet, and bake until toasted, about 8 minutes.
• Let cool, then finely chop.
• Meanwhile, beat 3 cups of the heavy cream, the pumpkin pie puree and 3 tablespoons of the confectioners' sugar with an electric mixer in a large bowl until stiff peaks form, about 5 minutes.
• Put 1 of the baked dough rounds on a cutting board, and center a 9-inch round cake pan on top of it.
• Use the cake pan as your guide to trim the dough with a knife into a 9-inch circle.
• Reserve the scraps in a bowl.
• Repeat with the remaining dough round.
• Crumble the scraps into bite-sized pieces.
• Line the cake pan with plastic wrap, leaving a 2-inch overhang on all sides.
• Spread a third of the pumpkin mixture on the bottom of the pan, followed by 1 of the baked dough rounds.
• Top with half the remaining pumpkin mixture, then the crumbled dough scraps.
• Finish with the remaining pumpkin mixture and dough round.
• Cover tightly with plastic wrap, and refrigerate for 12 hours or overnight.
• When ready to serve, unwrap the plastic wrap, and invert the cake onto a platter.
• Remove the cake pan and plastic wrap.
• Press the chopped walnuts into the sides of the cake.
• Beat the remaining 1/2 cup heavy cream, 1 tablespoon confectioners' sugar and 1/4 teaspoon cinnamon together until soft peaks form; slather the mixture on top of the cake.
• Cut into slices with a serrated knife.