Preheat oven to 325°F (163°C) and line a baking sheet with parchment paper.
Mix dry ingredients: In a large bowl, combine oats, protein powder, cocoa powder, and salt.
Combine wet ingredients: In a separate bowl, whisk together melted coconut oil, honey (or maple syrup), almond butter, and vanilla extract.
Mix everything together: Pour the wet mixture over the dry ingredients and stir until well coated.
Spread on baking sheet: Evenly spread the granola mixture on the prepared baking sheet.
Bake for 18-22 minutes, stirring halfway through, until crisp and lightly golden.
Cool completely before adding chocolate chips and nuts (if using).
Store in an airtight container for up to 2 weeks.