Preheat your oven to 350°F (175°C) and line a baking sheet with parchment paper.

In a medium bowl, whisk together all-purpose flour, baking soda, salt, and cocoa powder until well-combined.

In a large bowl, whisk together brown sugar, granulated sugar, oil, maple syrup, and vanilla extract until sugars are dissolved.

Gradually add the dry ingredients to the wet mixture and fold gently until just combined.

Fold in chocolate chips and optional chopped nuts until evenly distributed.

Use a spoon or cookie scoop to drop rounded tablespoonfuls onto the prepared baking sheet, leaving space in between.

Bake cookies for 10-12 minutes until edges are set and centers look soft.

Let them cool on the baking sheet for about 5 minutes before transferring to a wire rack to cool completely.