01 - Preheat oven to 350°F. Line two baking sheets with parchment paper.
02 - In a medium bowl, whisk together gluten-free flour blend, cocoa powder, baking soda, and fine sea salt until evenly mixed.
03 - In a large bowl, beat softened butter, light brown sugar, and granulated sugar using an electric mixer until creamy and light, about 2 minutes.
04 - Add eggs one at a time, beating well after each addition. Mix in pure vanilla extract until smooth.
05 - Gradually stir dry ingredients into the wet mixture, mixing just until combined without overworking the dough.
06 - Gently fold in dark chocolate chips or chunks and chopped roasted cashews until evenly distributed.
07 - Scoop dough by rounded tablespoons onto prepared baking sheets, spacing each about 2 inches apart.
08 - Bake for 11 to 13 minutes, until edges are set and centers are slightly soft.
09 - Allow cookies to cool on baking sheets for 5 minutes before transferring to a wire rack to cool completely.