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

In a large mixing bowl, cream together the unsalted butter, granulated sugar, brown sugar, and vanilla extract using an electric mixer until light and fluffy.

Sift together the all-purpose flour and salt in a separate bowl, then gradually add this to the creamed mixture, stirring gently until just combined.

Roll small portions of dough into balls, about 1 inch in diameter, and place them evenly spaced on the lined baking sheet.

Gently flatten each ball with your palm and sprinkle a pinch of flaky sea salt over the tops.

Bake in the preheated oven for 12-15 minutes until the edges are lightly golden.

Allow the cookies to cool on the baking sheet for about 2-3 minutes before transferring them to a wire rack to cool completely.