Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Not So Black

I looked everwhere to change my daughter's birthday cake frosting black when the frosting was white. This product sprays on and says it will give it a black color. I followed the instructions perfectly and it gave it a grayish color only if you sprayed a bunch on. The smell was awful and it looked awful. Realizing it wasn't going to work I stopped and tried to scrape it off. The entire cake absorbed the flavor - it was horrible and the cake ended up in the garbage.