1/2 cup (115g) unsalted butter, softened to room temperature1
1/2 cup (100g) granulated sugar
1/2 cup (100g) packed light or dark brown sugar
1 large egg, room temperature preferred1
1 teaspoon vanilla extract
1 cup (125g) all-purpose flour (spoon & leveled)
1/2 cup + 2 Tablespoons (53g) natural unsweetened cocoa powder
1 teaspoon baking soda
1/8 teaspoon salt
2 Tablespoons (30ml) milk
1 and 1/4 cups (225g) white chocolate chips, plus a few more to sprinkle on top
