2tablespoonsplus 1/2 teaspoon pure vanilla extract
1 1/2cupsmini semisweet chocolate chips
1/2cupto 1 cup cocoa nibs
Whisk flour and salt in a large bowl; set aside. Place butter and cream cheese in the bowl of an electric mixer. Using the paddle attachment, beat on medium speed until pale and fluffy (approximately 2 minutes). Add sugar and vanilla and mix until combined. While mixer is running on low-speed, add flour mixture, and continue to mix until just combined. Mix in mini chocolate chips by hand.
Transfer half of dough to a large sheet of parchment paper. Shape into a long log about 2 inches in diameter. Wrap in parchment paper and repeat with other half of the dough. Freeze until firm, at least 30 minutes or up to 2 weeks.
Preheat oven to 350°F. Prepare baking sheet by lining with parchment paper. Unwrap one log, roll in cocoa nibs (pressing lightly to adhere), coating lightly. Cut into 1/4-inch-thick rounds. Space approximately 1 inch apart on baking sheets.
Bake cookies until golden around edges, 16 to 18 minutes. Let cool slightly before removing from trays and letting cool completely on wire racks.