Maple flavors cover a multitude of sins and acetoin works well in all of them. Wright recommends using around 200 ppm.
Acetoin (FEMA# 2008, CAS# 513-86-0), also known as acetyl methyl carbinol, is found very widely in nature and is an interesting raw material in its own right. In recent years, it has received additional attention as a very effective alternative to diacetyl.
