Preheat oven to 350°F. Spread pecans in an even layer on a large rimmed baking sheet. Bake 10 minutes or until toasted and fragrant; cool on pan.
Meanwhile, beat butter and sugars on high speed in the bowl of a stand mixer fitted with the paddle attachment (or use hand mixer) until fluffy, about 5 minutes.
Add eggs and egg yolks, one at a time, beating well after each addition. Beat in vanilla.
Combine flour, baking powder, baking soda, and salt in a large bowl. With the mixer running on low speed, gradually beat into butter mixture until blended. Do not overmix.
Stir in pecans and chocolate chips with a rubber spatula or spoon. Cover dough and chill at least 30 minutes or up to 3 days.
Preheat oven to 350°F. Line 2 baking sheets with parchment paper. Scoop dough using a 2 oz cookie dough scoop and place 6 cookies on each baking sheet.
Bake 12 to 15 minutes or until edges are golden brown. Sprinkle with sea salt.