What are/is Black & White Cookies, Black & White Cake and White & Black Cake?

I'm asking what these are cause I have a bakery and all three of those are in it and I didn't make any of them and I was wondering how do you make them cause my sims have all 10 skills of baking, cooking and gourmet unless there things that the person who created the bakery downloaded or something? The cookies are half white half brown, the black & white cake is like the three layered cake and its all with white swirls and the white cake is the same but all white with black swirls.