01 -
Preheat the oven to 350°F (175°C).
02 -
Line baking sheets with parchment paper or silicone baking mats.
03 -
In a medium bowl, sift together the flour, cocoa powder, baking powder (or baking soda, noting the differences in texture), and salt.
04 -
In a large bowl, use an electric mixer to beat the butter, granulated sugar, and light brown sugar on medium-high speed until light in color and smooth.
05 -
Add the egg and vanilla extract, mixing until combined.
06 -
Gradually add the flour mixture to the wet ingredients on low speed, mixing until just combined.
07 -
Fold in the white chocolate chips or other mix-ins using a rubber spatula.
08 -
Using a spoon or a spring-loaded cookie scoop, drop 1 ½ to 2-tablespoon sized balls of dough onto the prepared baking sheets.
09 -
Flatten the dough balls with the palm of your hand to ensure even spreading.
10 -
Bake for about 10 minutes. Let the cookies cool on the baking sheets for 5 minutes before transferring them to wire racks to cool completely.
11 -
Add candy googly eyes on top of the cookies for a fun Halloween touch, if desired.
12 -
Store the cookies in an airtight container at room temperature for up to 5 days or freeze pre-scooped balls of cookie dough in a resealable bag, allowing them to thaw before baking as needed.