Place the peanuts onto a large baking sheet, aiming for a single evenly spread layer.
400 grams raw peanuts
Roast for about 20 minutes, or until the peanuts are a light golden brown. Remove from the oven and cool fully on a wire rack.
Once the peanuts are cool, add them to the bowl of a food processor fitted with the blade attachment. Add the salt.
400 grams raw peanuts, 1 teaspoon sea salt
Blend, keeping the small hole open for heat to escape, until completely smooth, 5-10 minutes. Scrape down the sides as needed if it builds up (turn off the processor first).
Transfer the peanut butter into a clean jar and store for about a week. This makes one large jar of peanut butter.