a table spoon of bbq sauce will do nothing. it takes quite a lot. maybe a cup.

what we have used that will work is several tbl spoons of high mountain seasonings or cabalas mesquite. go through the dry rubs and find what pops your cork.

the seasoning will settle to the bottom of the jar somewhat and there will be more flavor as you get to the bottom.
by.
a bouillon cube with a tsp of cavendars is the standard.