01 -
In a medium bowl, whisk together all-purpose flour, unsweetened cocoa powder, baking powder, and kosher salt until evenly distributed.
02 -
In a large bowl, beat salted butter, granulated sugar, and light brown sugar with a mixer on medium speed until pale and fluffy, about 3 to 5 minutes, scraping down the bowl as needed.
03 -
Incorporate the large egg and vanilla extract into the butter mixture, mixing until fully combined. Add red gel food coloring and continue beating until the dough achieves a uniform vibrant red hue.
04 -
Reduce mixer speed to low and gradually add the dry ingredient mixture to the wet ingredients. Mix just until combined to prevent overworking the dough.
05 -
Cover the dough and refrigerate for 20 minutes to firm up, which eases handling and shaping.
06 -
Set the oven to 350°F. Line two baking sheets with parchment paper to ensure cookies do not stick and bake evenly.
07 -
Scoop tablespoon-sized portions of chilled dough and roll into balls. Roll each ball thoroughly in granulated sugar and arrange them on baking sheets, spacing two inches apart.
08 -
Press the center of each dough ball gently with your thumb to form an indentation. Refrigerate the shaped cookies for an additional 20 minutes to maintain indent shape during baking.
09 -
Bake in the preheated oven for 12 to 14 minutes, rotating the baking sheets halfway through for even browning, until bottoms are lightly golden and cookies are set.
10 -
Allow cookies to cool on the baking sheets for 5 minutes before transferring to wire racks to cool completely.
11 -
Using a mixer at medium speed, beat room-temperature cream cheese and powdered sugar until smooth and creamy. Fill each thumbprint indentation with approximately one teaspoon of cream cheese frosting using a piping bag or spoon.