01 - Preheat oven to 350°F. Line two baking sheets with parchment paper for easy cleanup and to prevent sticking.
02 - In a medium bowl, whisk together the gluten-free flour blend, baking powder, baking soda, and salt until evenly distributed.
03 - Beat softened butter and 2/3 cup granulated sugar with an electric mixer on medium-high speed until light and fluffy, approximately 2 minutes.
04 - Mix in honey, egg, and vanilla extract to the butter mixture. Beat until fully incorporated and smooth, scraping down sides as needed.
05 - Gradually add the dry ingredients to the wet mixture, mixing on low speed until just combined. Avoid overmixing to prevent tough cookies.
06 - Gently fold the chopped pistachios into the dough using a spatula until evenly distributed throughout.
07 - Scoop tablespoon-sized portions of dough and roll into balls. Arrange on prepared baking sheets, spacing 2 inches apart to allow for spreading.
08 - Lightly flatten each cookie ball with your fingers or the bottom of a glass. Sprinkle tops with additional granulated sugar if desired for extra sweetness and crunch.
09 - Bake for 10-12 minutes until edges are just beginning to turn golden brown. Centers will still appear slightly soft but will firm upon cooling.
10 - Allow cookies to rest on baking sheet for 5 minutes before transferring to a wire rack. Cool completely to achieve optimal texture and prevent breaking.