Preheat your oven to 350 degrees Fahrenheit and line baking sheets with parchment paper to ensure the cookies come off of the pan cleanly after baking. In a large bowl, use a whisk to stir slightly cooled melted butter, light brown sugar, granulated sugar, room temperature egg, and vanilla extract together until smooth and fully combined.
Pour all purpose flour, baking powder, baking soda, and salt into the dough. Use a rubber spatula to mix the dry ingredients into the wet until all flour pieces disappear into the batter. Use a rubber spatula to mix in the chocolate chips.
Roll the dough into ¼ cup (65-70g) sized balls. Push additional chocolate chips into the tops of each dough ball for a bakery-style look. Bake the cookies for 9-11 minutes or until the edges look light golden brown, the tops look pale, and the centers look slightly soft.
Allow the cookies to fully cool before storing. Store in an airtight container, tightly covered, or individually wrapped at room temperature for up to 4 days or in the freezer for up to 4 months.