Step 1: Preheat your oven to 300°F (150°C). Line a large baking sheet with parchment paper.
Step 2: In a very large mixing bowl, combine the rolled oats, protein powder, chopped nuts, mixed seeds, cinnamon, and sea salt. Whisk them together thoroughly to ensure the protein powder is evenly distributed.
Step 3: In a separate, smaller bowl, whisk together the maple syrup (or honey), melted coconut oil, and vanilla extract until well combined.
Step 4: Pour the wet ingredients over the dry ingredients in the large bowl. Using a sturdy spatula, mix everything until the oats and nuts are completely coated. Ensure there are no dry spots.
Step 5: Spread the granola mixture evenly onto the prepared baking sheet. Press it down firmly with the back of your spatula to encourage clusters.
Step 6: Bake for 25-35 minutes, stirring gently once halfway through (around the 15-20 minute mark) if you prefer smaller clusters, or less often for larger clusters. Keep a close eye on it to prevent burning. The granola should be golden brown.
Step 7: Once baked, remove the baking sheet from the oven and let the granola cool completely on the baking sheet without touching it. This is crucial for forming crisp, sturdy clusters. Resist the urge to stir it while it's cooling.
Step 8: Once completely cool, break the granola into desired pieces. If using dried fruit, stir it in now. Transfer to an airtight container and store at room temperature for up to 2-3 weeks.
Step 9: Enjoy your homemade protein granola recipe with milk, yogurt, fruit, or as a delicious snack straight from the jar!