01 - Preheat oven to 350°F. Line two baking sheets with parchment paper.
02 - Whisk together gluten-free flour blend, cocoa powder, baking soda, and salt in a medium bowl. Set aside.
03 - Beat softened butter, granulated sugar, and brown sugar in a large bowl until light and creamy, approximately 2–3 minutes.
04 - Add eggs one at a time, beating well after each addition. Mix in vanilla extract.
05 - Gradually add dry ingredients to wet mixture, mixing on low speed just until combined.
06 - Fold in dark chocolate chips and chopped peanuts until evenly distributed throughout dough.
07 - Scoop tablespoon-sized dough balls onto prepared baking sheets, spacing approximately 2 inches apart.
08 - Bake for 11–12 minutes until edges are set but centers remain soft.
09 - Let cookies rest on baking sheet for 5 minutes, then transfer to wire rack to cool completely.