
In a large mixing bowl, combine the sugar, oil, pumpkin, egg yolk, and vanilla. Mix until well combined.
Place the powdered sugar in a small bowl. Using a 1.5-tablespoon cookie scoop (or a heaping tablespoon), portion out the dough and roll into the powdered sugar. Place on the prepared baking sheet. Add any optional decorations, like edible eyeballs or sprinkles.
Nutrition analysis (approximate per cookie): 105 calories, 4 g fat, 0.5 g saturated fat, 50 mg sodium, 18 g carbohydrate, 1 g fiber, 10.5 g sugar, 1.5 g protein, Vitamin D: 0%, Calcium: 1%, Iron: 4%, Potassium: 1%