Preheat oven to 350 degrees F.

Combine the pumpkin, sugar, vanilla, cinnamon, and pumpkin pie spice in a medium size mixing bowl. Beat with electric mixer until all ingredients are well combined. Set aside.

Spread a piece of parchment paper onto a flat work surface. Open and unroll dough sheet onto paper; press out to a 12x9 inch rectangle. Transfer parchment paper to a large baking sheet.

Spread mascarpone cheese down the center of dough, about 4 inches wide. Using an offset spatula makes this very easy. Sprinkle about half of the nuts over the mascarpone cheese. Spread pumpkin filling over the mascarpone and nuts.

Using a pastry cutter, or sharp knife, make 1 inch cuts in the dough down each side. Start at the top and braid dough over the filling. I like to take my hands and gently push the sides of braid together when I am finished so that it is not as flat.

Bake until golden brown, about 20-25 minutes. Remove from oven and transfer parchment paper/braid to a cooling rack. Allow to cool about 5-10 minutes.

Prepare the glaze.

In a small mixing bowl, beat together the confectioner sugar, mascarpone cheese, pumpkin and 1/2 teaspoon of milk. If mixture is too thick, may add the additional milk. If it becomes too thin just add a little more confectioner sugar.

Transfer braid to serving platter. Drizzle or spread glaze over the braid. Sprinkle remaining nuts over the top.

Cut into slices of desired size. May serve warm or at room temperature.