Chai Masala Pumpkin Pie

Name: Chai Masala Pumpkin Pie
Ingredients: Butter, for greasing the pan; Pie dough, enough for a single-crust 9-inch pie, plus extra if making the braid; 3/4 cup crème fraîche; 1 tablespoon cornstarch; 1 teaspoon ground cinnamon; 3/4 teaspoon ground ginger; 1/4 teaspoon ground cardamom; 1/8 teaspoon ground clove; 1/8 teaspoon fresh ground black pepper; 15 ounces pumpkin purée (see note); 1/4 cup heavy cream; 1/2 cup granulated sugar; 2 tablespoons brown sugar, light or dark, packed; 2 tablespoons pure maple syrup (I prefer grade B); 1/2 teaspoon medium-grain kosher salt; 3 eggs, at room temperature