Step 1

In a microwave safe bowl, melt butter in the microwave until melted.

Step 2

Add brown sugar and sugar. Whisk or stir vigorously until smooth. Add egg and vanilla and whisk until silky.

Step 3

Stir in flour, baking soda, and salt.

Step 4

Fold in milk chocolate and semi-sweet chocolate chips. Cover bowl with plastic wrap. Place in the refigerator and CHILL for at least 30 minutes. The cookie dough gets better with time. If time is on your side, I suggest chilling it for 24-48 hours. Chilling for at least 30 minutes is essential.

Step 5

When ready to bake, preheat oven to 350 degrees. Using a cookie scoop or spoon, place cookie dough on light colored baking sheets. Bake for 10-13 minutes, or until cookies become a light golden color.