Preheat Oven: Preheat your oven to 375°F (190°C). Line a baking sheet with parchment paper.
Coat the Tortillas: Brush both sides of each tortilla with melted butter. In a small bowl, mix the sugar and cinnamon together, then sprinkle evenly over both sides of the tortillas.
Shape the Shells: Fold each tortilla into a taco shape and place it upright on the baking sheet. To help hold the shape, lean the tortillas against each other or use a taco rack if you have one.
Bake: Bake in the preheated oven for 8-10 minutes, or until crisp and golden. Remove from the oven and let cool.
Make the Pumpkin Pie Filling:
Mix Ingredients: In a medium bowl, whisk together the pumpkin puree, heavy cream, brown sugar, cinnamon, nutmeg, ginger, cloves (if using), and vanilla extract until smooth.
Cook (Optional): For a creamier texture, you can heat the filling in a saucepan over medium heat for 3-5 minutes, stirring constantly, then let it cool slightly.
Assemble the Tacos:
Fill the Shells: Spoon or pipe the pumpkin pie filling into the cooled taco shells.
Top and Serve: Top with whipped cream, drizzle with caramel sauce, and sprinkle with crushed pecans or walnuts if desired.