Yes, they are! I just made some ginger molasses cookies the other day, and they came out super good.
That sounds awesome
my cakes are tasty ?
Maaaaaaybe if this was "ciastka" (sometimes a piece of cake that you can buy in a confectionery can be called "ciastko"), but not for "ciasteczka".
Just to be clear, są is "is" for plural, and jest is "is" for singular?
Well... "is" isn't for plural, isn't it? :) But well, you could say that, I guess.