Prep and Cook Time: about 45 minutes, plus 1 hour to chill. You can store them airtight for up to 3 days.
1/2 cup (1/4 lb.) butter, at room temperature
1/2 cup granulated sugar
1/2 cup powdered sugar
1/2 cup vegetable oil
1 large egg
1/2 teaspoon vanilla
2 cups all-purpose flour
1/2 teaspoon baking soda
1/2 teaspoon ground nutmeg
1/4 teaspoon salt
How to Make It
In a large bowl, with a mixer on medium speed, beat butter, granulated sugar, and powdered sugar until smooth. Add oil, egg, and vanilla and beat until well blended.
In a medium bowl, mix flour, baking soda, nutmeg, and salt. Stir into butter mixture, then beat until well blended. Cover bowl with plastic wrap and freeze until dough is firm, about 1 hour.
Shape dough into 1-inch balls and place about 2 inches apart on buttered or cooking parchment-lined 12- by 15-inch baking sheets. Flatten each cookie slightly with a floured fork.
Bake cookies in a 350° oven until edges are lightly browned, 8 to 10 minutes; if baking more than one pan at a time, switch pan positions halfway through baking. Let cookies cool on sheets for 5 minutes, then use a wide spatula to transfer to racks to cool completely.