Preheat oven to 350°F. Line a small baking sheet with silicone or parchment. Used a quarter-sheet pan.
Step 1
INSTRUCTIONS
Mix flour, baking powder, soda, and salt. Set aside. Beat butter, brown sugar, and sugar until frothy using a medium-speed electric mixer. Stir in egg yolk and vanilla.
Step 2
Lower mixer speed. Add flour mixture slowly, mixing just until incorporated. Mix in chocolate chips.
Step 3
On the prepared pan, drop 3-tablespoons of dough. Lightly flatten each cookie's top. Bake cookies 14-16 minutes till golden brown.
Step 4
Take 5 minutes to cool on a wire rack in the pan. Remove the cookies from the pan to cool on a wire rack.