01 - Preheat oven to 350°F. Line two baking sheets with parchment paper.
02 - Whisk together flour, baking soda, baking powder, and fine sea salt in a medium bowl.
03 - Beat butter, honey, and brown sugar with an electric mixer until creamy and light, about 2–3 minutes.
04 - Add egg and vanilla extract to the butter mixture, beating until fully incorporated.
05 - Gradually add the dry ingredients to the wet ingredients, mixing until just combined.
06 - Fold in chopped pistachios until evenly distributed throughout the dough.
07 - Scoop tablespoon-sized portions of dough onto prepared baking sheets, spacing about 2 inches apart. Lightly flatten each ball and sprinkle with flaky sea salt.
08 - Bake for 10–12 minutes until edges are lightly golden but centers remain soft.
09 - Let cookies cool on the baking sheet for 5 minutes before transferring to a wire rack to cool completely.