01 - Preheat 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 creamy, approximately 2 minutes.
04 - Add the egg and vanilla extract to the creamed mixture, beating until fully combined and smooth.
05 - Gradually add the dry ingredient mixture to the wet ingredients, mixing on low speed until just combined. Be careful not to overmix.
06 - Gently fold in the dark chocolate chips or chunks 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. Flatten each dough ball slightly with your fingers or the back of a spoon for a crispier finish.
08 - Bake for 10 to 12 minutes, or until the edges are golden brown and the centers appear set.
09 - Allow the cookies to rest on the baking sheets for 5 minutes, then transfer to a wire rack to cool completely before serving or storing.