Heat the coconut oil in a skillet over medium heat. Add the chopped plums to the preheated pan and cook them until soft, about 8 to 10 minutes. If the plums begin to brown at all, reduce the heat.
Carefully spoon the hot cooked plums into the bowl of a small food processor or blender. Purée the plums until smooth, about 1 to 2 minutes.
Add all of the other ingredients to the puréed plums. Process or whisk everything together until well combined.
Taste the vegan BBQ sauce and adjust the seasoning to suit your taste — you may like your sauce a bit sweeter, or maybe spicier. Use the recipe as a base and then make it your own! Store vegan BBQ sauce in a glass or plastic container with a tight-fitting lid in the fridge for up to one week. Use it anywhere you would any other BBQ sauce.
Notes
The color of your BBQ sauce is dependent on the plums you choose.
You can omit the liquid smoke, but keep in mind this recipe has been tested with the flavor of liquid smoke balanced with the other ingredients.
If you prefer a smoother sauce without any bits, you can strain it using a fine-mesh sieve or cheesecloth.
Storage
Refrigerator: Store leftover sauce in an airtight container in the fridge for up to 1 week.
Freezing: For longer storage, freeze the sauce in an airtight container for up to 2 months. Thaw overnight in the refrigerator before using or defrost on low in the microwave.