Melt the coconut oil and let it cool slightly. In a blender, combine coconut oil, cashews, vegan milk, apple cider vinegar, salt, nutritional yeast, and optionally: turmeric. Blend until smooth and creamy. Add olive oil and briefly blend again until combined.
Pour the butter mixture into a small rectangular silicone mold.
Refrigerate for about 2 hours until firm.
Notes
The vegan butter can be stored in the refrigerator for about 1-2 weeks.