Adjust oven rack to middle position and preheat to 400°F (200°C). Combine butter, white sugar, brown sugar, malted milk powder, vanilla, salt, baking soda, baking powder, and nutmeg in the bowl of a stand mixer fitted with a paddle attachment. Mix on low to moisten, then increase to medium and beat until light and fluffy, about 5 minutes. With mixer running, add egg and continue beating only until smooth. Reduce speed to low and add flour all at once, followed by chopped chocolate, then mix to form a stiff dough.
Published at Fri, 19 Jan 2018 12:50:16 +0000