01 - Preheat the oven to 350°F (175°C). Line two baking sheets with parchment paper and set aside.
02 - In a medium bowl, whisk together the gluten-free flour blend, baking soda, fine sea salt, and instant espresso powder until evenly distributed.
03 - In a large bowl, beat the softened unsalted butter with granulated sugar and packed light brown sugar using an electric mixer until the mixture is light and fluffy, approximately 2–3 minutes.
04 - Add the eggs one at a time, beating well after each addition. Mix in the pure vanilla extract until fully combined.
05 - Gradually add the dry ingredient mixture to the wet ingredients, stirring gently until just incorporated. Be careful not to overmix.
06 - Fold the dark chocolate chips and coarsely chopped macadamia nuts into the dough, distributing them evenly throughout.
07 - Scoop tablespoon-sized portions of dough onto the prepared baking sheets, spacing them approximately 2 inches apart to allow for spreading.
08 - Bake for 11–13 minutes, or until the edges are set and the centers still appear slightly soft. Avoid overbaking for a chewy texture.
09 - Allow the cookies to rest on the baking sheets for 5 minutes, then transfer them to a wire rack to cool completely before serving or storing.