01 - Preheat oven to 350°F. Line two baking sheets with parchment paper.
02 - In a medium bowl, whisk together flour, baking soda, baking powder, and fine sea salt until well blended.
03 - In a large bowl, beat butter, honey, granulated sugar, and brown sugar until light and creamy, approximately 2-3 minutes.
04 - Add egg and vanilla extract to the butter mixture, beating until fully incorporated.
05 - Gradually add dry ingredients to wet ingredients, mixing just until no dry streaks remain. Do not overmix.
06 - Fold in chopped pistachios, reserving 2 tablespoons for topping.
07 - Scoop tablespoon-sized portions of dough onto prepared baking sheets, spacing at least 2 inches apart. Press reserved pistachios onto each dough ball and lightly flatten.
08 - Bake for 11-13 minutes until edges are golden brown and centers are just set.
09 - Remove from oven and immediately sprinkle with flaky sea salt. Let cookies cool on baking sheet for 5 minutes before transferring to wire rack to cool completely.