Take a small saucepan in which you’re going to combine all your ingredients and then set it over medium-high heat at first. Here, you’ll proceed to add all of your ingredients one by one - beginning from the ketchup, with your water being the final ingredient that you add to your saucepan.
To combine all these ingredients efficiently, you’ll need to gently whisk all of the ingredients together.
After these ingredients have been successfully combined, you need to do bring them to a low boil.
Once the ingredients have boiled, turn the heat down so that it begins to simmer instead.
You’ll need to let all the combined ingredients simmer for around 20 minutes depending on your heat - or at least to a point where you see the liquid is reduced and thickening.
Once you see the liquid thicken to a consistency that resembles barbecue sauce, you can take the saucepan off the heat and let it cool to your desired temperature.
Once you’ve let your homemade vegan BBQ sauce cool down according to this vegan BBQ sauce recipe, you’ll need to store it in a glass container, such as a glass jar. You can also choose to seal it - this way, you can store your homemade vegan BBQ sauce for a period of three weeks.
If you’re making large batches of your homemade vegan BBQ sauce, you can choose to multiple the aforementioned proportions of each ingredient accordingly.