Step 1

Preheat oven to 350 degrees. Line a baking sheet with either parchment or a nonstick baking pad; set aside.

Step 2

In a large bowl, use a handheld mixer to beat together the butter and sugar until light and fluffy, about 2 minutes. Mix in the pumpkin, egg, cinnamon, baking powder, vanilla, nutmeg, ginger, and salt until well combined. Add in the flour and mix until a dough forms.

Step 3

Scoop the dough onto prepared baking sheet. Divide the dough in half and shape it into two 10" x 2½" logs. Use your hands to press the logs into long rectangles and smooth evenly. Bake biscotti dough for 25 minutes.

Step 4

Remove the biscotti logs from the oven and let rest on baking sheet for 5 minutes. Then, using a serrated knife, cut the logs either diagonally or crosswise into ½" to ¾" slices.

Step 5

Lay the biscotti flat on the prepared baking sheet. Return biscotti to the oven and bake for 15-25 minutes more, until they start to turn golden brown on the edges. (The longer you bake, the crunchier your biscotti will be). Remove from oven and let cool on wire rack.

Step 6

Place the white chocolate in a small microwave safe bowl. Microwave for 3-4 minutes on 50% power until the chocolate is melted; stopping to stir every 30 seconds. Transfer the chocolate to a small piping bag (or ziplock bag) and drizzle over the cooled biscotti. Let chocolate set before serving.