Preheat your oven to 350°F (175°C). Line a baking sheet with parchment paper or a silicone baking mat to prevent sticking and make cleanup easier.
In a medium bowl, sift together 1 cup all-purpose flour, 1/3 cup unsweetened cocoa powder, 1 teaspoon baking powder, and 1/4 teaspoon salt. Set aside.
In a large mixing bowl, whisk together 1/2 cup granulated sugar and 1/2 cup packed brown sugar until well combined. Add 2 large eggs, one at a time, beating well after each. Stir in 1 teaspoon vanilla extract, 2 tablespoons cooled strong brewed espresso or coffee, and 1/4 cup vegetable oil until the mixture is smooth.
Gradually add the dry ingredients into the wet ingredients, folding gently with a spatula until fully incorporated. Be careful not to overmix, as this can make the cookies tough.
Fold in 1/2 cup chocolate chips evenly throughout the dough for delicious melty bites.
Cover the dough and chill it in the refrigerator for at least 30 minutes. This helps the dough firm up, making it easier to roll and ensuring better cookie shape.
Place 1/4 cup powdered sugar in a shallow bowl. Using a spoon or cookie scoop, scoop out dough and roll into 1 1/2-inch balls. Roll each ball generously in powdered sugar until fully coated.
Arrange the coated dough balls on the prepared baking sheet, spacing them about 2 inches apart. Bake for 10-12 minutes, or until the cookies have spread and the surface has cracked, revealing the fudgy interior.
Remove cookies from the oven and let them cool on the baking sheet for 5 minutes before transferring to a cooling rack. Enjoy warm or at room temperature with your favorite cup of coffee or milk.