This is the 4622nd most frequent German word.
süße
"Süße" means "sweetness" or "sweet" (feminine form).
Here, 'süße' is an adjective that describes the quality of the cakes, indicating that they are sweet in taste or appearance.
Die süße Kuchen duften herrlich.
The sweet cakes smell wonderful.
In this sentence, 'süße' is an adjective used affectionately to describe the speaker's cat, implying endearment.
Meine süße Katze schläft gerade.
My sweet cat is currently sleeping.
Here, 'süße' as an adjective metaphorically describes life as pleasant and enjoyable.