01 - Preheat the oven to 350°F. Line a baking sheet with parchment paper.
02 - Arrange rolled oats, cashews, almonds, sunflower seeds, and pumpkin seeds in an even layer on the prepared baking sheet. Toast in the oven for 10 to 12 minutes, stirring once halfway through, until mixture is aromatic and lightly golden. Allow to cool for 5 minutes.
03 - Transfer the toasted mixture to a food processor. Add maple syrup, melted coconut oil, brown sugar, vanilla extract, ground cinnamon, and sea salt. Process for 2 to 3 minutes, pausing to scrape down the bowl, until smooth and creamy.
04 - If desired, incorporate flaxseed meal and chia seeds. Blend until fully integrated into a cohesive spread.
05 - Taste and modify the sweetness or salt to preference. Blend additionally for a silkier consistency.
06 - Transfer granola butter to a clean, airtight jar and refrigerate up to 2 weeks. Stir before each use.