In a large saucepan, add water, vanilla extract, allulose and cream of tartar and combine well
Bring the mixture to a rolling boil and stir
Once everything is at a boil, reduce heat to a simmer and allow it to reduce. Stir occasionally. Allow liquid to continue simmering until the liquid has reduced by half and the syrup covers the back of a wooden spoon and is thick while mixing. The color should turn a golden yellow
At this point, taste for sweetness and add 3-4 drops of liquid sucralose or stevia if you'd like it to be sweeter. This step is completely optional
While whisking, slowly sprinkle the tara gum into the liquid and combine well. The syrup should now be very thick.
The syrup will thicken as it cools so don't be deceived by how thin it is at first. If after it cools, it still isn't thick enough, reheat and add another 1/8-1/4 tsp of tara gum.
Allow to cool for a few minutes and transfer to an air tight container. Store in pantry for up to 3 months.