These are the BEST chocolate crinkle cookies — rich and fudgy on the inside, and crispy on the outside. Every chocolate lover in your life will go crazy for these!
Chop the chocolate and add it to a microwave-safe bowl along with the butter. Heat the mixture in the microwave until it is melted and smooth.
In the bowl of a stand mixer, beat the eggs and sugar together until the mixture has tripled in volume, about 15 minutes. Gradually whisk in the cooled chocolate and butter, then add the vanilla.
Sift the flour and combine it with the salt and baking powder.
Gradually add the dry ingredients to the egg mixture and mix just until no flour streaks remain. Cover the bowl and chill the dough in the refrigerator for at least 4 hours, or up to overnight. The dough should be stiff and easy to roll.
Working quickly to keep the dough cold, portion and roll out cookie dough balls. Fully coat each cookie in the powdered sugar. Place the cookies about 2 inches apart on a parchment-lined baking sheet.
Bake the cookies at 350°F for 12-15 minutes, or until the outside has a hard shell but the inside still feels soft. Take care not to overbake. Enjoy!