Combine dry ingredients in a bowl. Add vanilla paste and coconut oil. If the coconut oil is hard (depends on the temperature of your pantry), you can put it in the microwave for about 15-20 seconds, so that it softens.
Mix everything until combined. You want to get a sugary paste out of this. Depending on the consistency, add more sugar or oil if needed.
Put the scrub into jars and decorate any way you like. Keep in a dark place and use with 1-2 months.
Notes
You can use a mix of light and dark brown sugar. An alternative would also be demerara sugar or turbinado.