What are compound, finishing or flavored butters?

Wiki pedia   definition: Compound butters (Frenchbeurre composé, pl. beurres composés) are mixtures of butter and supplementary ingredients. Primarily, they are used to enhance flavor in various dishes, in a fashion similar to a sauce.

Compound butters are synonymous with finishing butters and flavored butters. Fireworks uses the term finishing butters purely for the final presentation. However, the product is most definitely suitable for substituting in place of plain butter. 

Fireworks Finishing Butters contain no antibiotics or growth hormones, no pesticides and are rBGH free. The flavored butters can be used in a recipe as an ingredient or at the end of cooking to give your food that little extra kick.