Preheat your oven to 350°F (175°C) and line a baking sheet with parchment paper.

In a medium bowl, whisk together 2 ¼ cups of all-purpose flour, ½ teaspoon of baking soda, ½ teaspoon of baking powder, and ½ teaspoon of salt.

In a large mixing bowl, combine ½ cup of melted butter with ¾ cup of brown sugar and ½ cup of granulated sugar. Mix until smooth and creamy.

Add one large egg and 1 teaspoon of vanilla extract to the butter-sugar mixture. Whisk until fully incorporated.

Fold the dry mixture into the wet mixture gently until just combined.

Fold in 1 cup of semisweet chocolate chips, reserving some for topping.

Scoop the dough onto the baking sheet, leaving space between each scoop.

Bake for 12-15 minutes until edges are golden and centers are slightly soft.

Sprinkle with reserved chocolate chips and flaky sea salt after removing from oven.

Cool on the baking sheet for 5 minutes, then transfer to a wire rack for 15 minutes.