There are several synonyms for the phrase "brown stuffs". Some common options include "chocolatey substances," "cocoa-colored materials," and "toasty hues." Other synonyms might include "burnt sienna goodies," "rich mocha elements," or "amber-colored accoutrements." Depending on the context and usage of the term, there may be other suitable options as well. For example, if referring to a savory dish, "earthy ingredients" or "rustic spices" might be more appropriate than terms like "sweets" or "treats." Ultimately, the choice of synonym will depend on the specific nuance and tone desired for the phrase in its given context.