Step 1

Preheat oven to 350°F. Line baking sheets with parchment paper.

Step 2

In the bowl of a stand mixer fitted with the paddle attachment, beat the butter and sugars together on medium speed until light and fluffy, about 3 minutes. Scrape the bowl down before adding in the vanilla extract and egg, beating well to combine.

Step 3

In a separate bowl, sift together the flour, cocoa, salt, baking soda, and baking powder. Gradually add in the dry ingredients to the wet ingredients and beat until a slightly sticky dough forms. Fold in ¾ cup (128 grams) of the white chocolate chips with a spatula.

Step 4

Using a small spring-loaded scoop, drop 1-tablespoon sized balls of dough onto the prepared baking sheets, spacing them about 2 inches apart. Dot the balls of cookie dough with remaining ¼ cup (42 grams) of white chocolate chips. Bake for about 8 minutes, until puffy but still soft, being careful not to overbake. Allow to cool on baking sheet for 5 minutes before removing to a wire rack to cool completely.