The answer to this is molasses. This is not considered to be a typical wing sauce ingredient. It is possible that someone has tried it already. It would depend on people’s taste. There are some who would like their buffalo wings sauce to be a bit sweet.
There is a version of molasses that is used in baking and this may be the version that people use too if in case they would like to try including it in their buffalo sauce. Some people do not realize that vinegar is also added to the sauce. It is responsible for putting a bit of acid on the sauce to make the buffalo wings taste great.