Pumpkin Spice Biscotti

Name: Pumpkin Spice Biscotti
Prep time: 55 min
Cook time: 50 min
Total time: 1 h 45 min
Cuisine: European, Italian, Mediterranean
Ingredients: 120 grams canned pureéd pumpkin (1/2 cup); 105 grams granulated sugar (1/2 cup); 105 grams dark brown sugar (1/2 cup, packed); 60 grams unsalted butter, softened (4 tablespoons); 1 egg; 350 grams all-purpose flour (2 3/4 cups); 2 teaspoons baking powder; 1/2 teaspoon kosher salt; 1 tablespoon pumpkin spice; 3/4 teaspoon ground cinnamon; 1/4 teaspoon ground nutmeg; 1/4 teaspoon ground ginger; Pinch ground allspice; Pinch ground cloves; Good-quality white chocolate, for dipping or drizzling; Demerara sugar, for sprinkling