Cream butter and sugars: In large bowl, beat softened butter, granulated sugar, and brown sugar with electric mixer on medium speed for 2-3 minutes until light and fluffy.
Add wet ingredients: Beat in eggs one at a time, mixing well after each. Stir in vanilla extract until combined.
Combine dry ingredients: In separate medium bowl, whisk together flour, baking soda, and salt until evenly mixed.
Mix wet and dry: Gradually add dry ingredients to wet ingredients, mixing on low speed until just combined. Do not overmix.
Add chocolate chips: Fold in chocolate chips with spatula until evenly distributed throughout dough.
Chill dough: Cover bowl tightly with plastic wrap and refrigerate for at least 30 minutes, or up to 24 hours for best results.
Prepare and bake: Preheat oven to 375°F. Line baking sheets with parchment paper. Drop rounded tablespoons (or use 2-tablespoon cookie scoop) onto sheets, spacing 2 inches apart.
Bake cookies: Bake for 9-12 minutes until edges are golden brown and centers still look slightly soft. Do not overbake.
Cool properly: Let cookies cool on baking sheets for 5 minutes, then transfer to wire rack to cool completely.