Preheat oven to 350º.¼½¾
Melt the chocolate and butter in a microwave-safe bowl, starting with 60 seconds, stirring, then heating and stirring in 30-second increments until smooth.
Add sugar; mix well. Add the eggs and mix until combined. Add the vanilla.
Add the flour and mix until incorporated. Add chocolate chips and mix until well distributed.
Drop by rounded tablespoons onto a parchment-lined cookie sheet. Bake for 10 minutes. The centers should still look underbaked. Cool on the pan for 10 minutes before removing to a cooling rack.
