Preheat the oven to 150°C (300°F). Place the hazelnuts, maple syrup, cinnamon, and salt onto a large baking sheet with higher sides. Line with parchment paper if preferred.
300 grams (2 cups) raw hazelnuts, 50 ml (~¼ cup) maple syrup, 1 teaspoon cinnamon, ½ teaspoon sea salt
Use a wooden spoon or spatula to mix the nuts until fully coated, then bake for 15 to 20 minutes, or until golden in colour and the nuts smell toasted.
Cool for a few minutes before adding to a food processor. Make sure the small opening is open to let steam escape, then blend, scraping down the sides as needed, for about ten minutes.
The nuts will turn into a meal first, then start to ball together as the oils are released. Continue to blend until a very smooth, runny nut butter forms.
Transfer the hazelnut butter into a jar or container, then cool fully at room temperature before refrigerating. This recipe makes about 500 ml, or 2 cups.
Notes
Storage: I usually keep nut butter on the counter, but I understand that this is uncomfortable for some people (I do keep the kitchen quite cold). You can refrigerate it if you prefer.Freezing: this can be frozen for up to three months in airtight containers. Thaw in the refrigerator or at room temperature and stir well before use.