In medium bowl, whisk together flour, cocoa powder, baking powder, and salt. 1 3/4 cups all-purpose flour,1/4 cup unsweetened cocoa powder,2 teaspoons baking powder,1/4 teaspoon salt.
In large bowl, beat butter and granulated sugar until light and fluffy, about 3 minutes.1/2 cup unsalted butter,1 cup granulated sugar.
Add eggs, red food coloring, vanilla, and vinegar, beating until well combined and bright red.2 large eggs,2 tablespoons red food coloring,1 teaspoon vanilla extract,1 teaspoon white vinegar.
Gradually mix dry ingredients into wet ingredients until just combined.
Cover dough and refrigerate at least 2 hours until firm enough to roll.
Heat oven to 350°F. Line baking sheets with parchment paper.
Place powdered sugar in shallow bowl. 1 cup powdered sugar for rolling.
Scoop rounded tablespoons of dough and roll into balls.
Roll each ball generously in powdered sugar until completely coated.
Place on prepared baking sheets about 2 inches apart.
Bake 10-12 minutes until edges are set and tops are cracked.
Let cool on baking sheet 5 minutes before transferring to wire rack.
Notes
PRO TIPS: One of my biggest tips is don't skip the chilling time! Give yourself enough time, at least 2 hours or even a half hour longer if your kitchen is warm. The dough needs to be firm enough to roll into balls without sticking everywhere.Also, be generous with the powdered sugar, really coat those balls! The more powdered sugar you use, the better the crackle effect will be, just like traditional crinkle cookies.And don't over bake them, take them out when they still look slightly soft in the center for the best chewy texture.*I use Butler's Red Food Coloring Brand.