01 - Preheat the oven to 350°F. Line two baking sheets with parchment paper.
02 - In a medium bowl, whisk together the gluten-free flour blend, baking soda, and sea salt until evenly distributed.
03 - In a large bowl, beat the softened butter, cashew butter, brown sugar, and granulated sugar using an electric mixer until light and fluffy, about 2 to 3 minutes.
04 - Add the egg and vanilla extract to the butter mixture, mixing until fully incorporated and smooth.
05 - Gradually add the dry ingredient mixture to the wet ingredients, mixing gently just until combined. Avoid overmixing.
06 - Fold in the dark chocolate chips and chopped roasted cashews until evenly distributed throughout the dough.
07 - Scoop tablespoon-sized portions of dough onto the prepared baking sheets, spacing them about 2 inches apart to allow for spreading.
08 - Bake for 10 to 12 minutes, until the edges are golden and the centers are just set.
09 - Let the cookies cool on the baking sheets for 5 minutes, then transfer to a wire rack to cool completely.