"I have cookies!"
Can you give a hint as to how to make the transition to "simple" with spelling the words? Are there some spelling rules? I am confused by the number of z's in the spellings. I have to write down the spelling and copy it every time from my notebook to get the correct number of z's. Saying it is simple isn't helping me. Thanks!
Well, they are plural, so kinda none of those, because plurals are divided differently. They are 'not masculine-personal plural' (non-virile), because they aren't a plural word for male people.
When we look at the singular "ciasteczko", it is neuter.
Wiktionary should be able to tell you the gender of any noun you find in this course.