Ingredients
Equipment
Method
- Heat chopped bittersweet chocolate and cubed unsalted butter in a heatproof bowl over a pot of simmering water, stirring until completely melted and smooth.
- Remove chocolate mixture from heat and let cool for 5 minutes until lukewarm to the touch.
- Whisk 1 cup granulated sugar, eggs, pure peppermint extract, and vanilla extract into cooled chocolate until shiny and smooth.
- Whisk all-purpose flour, Dutch-process cocoa powder, baking powder, and fine sea salt together in a separate medium bowl.
- Fold dry ingredients into wet mixture with a rubber spatula just until no white flour streaks remain.
- Stir white chocolate chips into batter until distributed throughout dough.
- Cover bowl with plastic wrap and chill in refrigerator for 60 minutes until firm.
- Preheat oven to 350°F (175°C) and line two large baking sheets with parchment paper.
- Place remaining 1/2 cup granulated sugar in one shallow bowl and 1/2 cup powdered sugar in a second shallow bowl.
- Scoop 1.5-tablespoon portions of chilled dough and roll between palms into smooth round balls.
- Roll each dough ball thoroughly in granulated sugar to coat completely.
- Roll each sugar-coated ball heavily in powdered sugar until thick white coating forms.
- Arrange dough balls 2 inches apart on prepared baking sheets.
- Bake at 350°F (175°C) for 10 minutes until edges set and cracks form across tops.
- Cool cookies on baking sheet for 10 minutes before transferring to a wire rack to cool completely.
Notes
If baking at high altitude above 3,000 feet, reduce baking powder to 3/4 teaspoon and increase oven temperature to 375°F to maintain fudgy structure without over-expanding.
To double this recipe, bake sheets one at a time on the middle rack rather than crowding two sheets in the oven simultaneously.