1add peanuts to a food processor and blend until a thick nut butter forms. stream in oil and vanilla with the processor on, continuing to run it until the mixture is smooth this took me about 3-4 minutes.
2you can add more oil if needed, just do it in small increments. turn off processor add melted chocolate and turn processor back on. blend until smooth.
3i kept mine at room temperature for a week, but i do recommend refrigerating the butter if you want to keep it a few weeks.