In the bowl of a stand mixer, mix the ½ cup vegetable oil, 4 oz unsweetened chocolate (melted), and 2 cups sugar until combined.
Add 4 eggs, one at a time, beating after each addition. Add 2 teaspoons vanilla extract.
Stir in the 2 cups flour, 2 teaspoons baking powder, and ½ teaspoon salt just until combined. Cover and chill for at least two hours.
Preheat oven to 350°F. Place 1 cup powdered sugar in a bowl.
Roll the dough into 1¼ inch balls. Roll each ball in the powdered sugar. Place 2 inches apart on a greased baking sheet (or line the baking sheet with a silicone mat).
Bake for 10–11 minutes or until the centers are no longer wet. Let sit for 5 minutes on the pan before removing to a wire rack.
Notes
Any neutral flavored oil, like canola oil or grapeseed oil, will work in place of the vegetable oil. You can substitute 1 teaspoon of almond extract for the vanilla extract if you'd like. The dough will keep in the fridge for a few days before baking.The cookies will keep at least a week in a tightly sealed container at room temperature. You can also freeze the cookies.