Add the peanuts to a food processor or high-powered blender.
Blend for 5-10 minutes, stopping to scrape down the sides as needed, until the peanuts have turned into a smooth, creamy peanut butter.
If the peanut butter is too thick, add the peanut oil and blend again until it reaches your desired consistency.
Transfer the peanut butter to an airtight container and store at room temperature for up to 2 weeks.
