In a medium bowl, whisk the flour, cocoa powder, baking powder, and salt together.
1 cup all-purpose flour, ½ cup unsweetened cocoa powder, 1 teaspoon baking powder, ¼ teaspoon kosher salt
In a separate large bowl, whisk the granulated sugar, brown sugar, oil, eggs, vanilla, and espresso powder together.
½ cup granulated sugar, ¼ cup brown sugar, ¼ cup vegetable oil, 2 large eggs, 1 teaspoon pure vanilla extract, ½ teaspoon espresso powder
Add the dry ingredients to the wet and stir until just combined. Add in the chocolate chips and mix until they are evenly distributed. Try not to overmix the dough.
½ cup mini chocolate chips
Cover and chill for at least 2 hours.
Preheat oven to 350°F. Line 2 baking sheets with parchment paper.
Roll the cookie dough into 1-inch round balls. Coat the cookies in powdered sugar and place them 2 inches apart on the prepared baking sheets.
1 cup powdered sugar
Bake for 8-10 minutes until the edges of the cookies are set. Cool on the baking sheet for 5 minutes before transferring to a wire rack to cool completely.