This is the 15724th most frequent Russian word.
присыпана
Dust-covered; sprinkled.
Here, "присыпан" describes the state of the cake being covered lightly with powdered sugar, referring to a physical topping process.
Торт присыпан сахарной пудрой.
The cake is sprinkled with powdered sugar.
In this sentence, "присыпана" is used to indicate the ground being lightly covered by leaves, typically from a natural process.
Земля была присыпана осенними листьями.
The ground was sprinkled with autumn leaves.
This usage of "присыпан" emphasizes the act of dusting the cupcake with cinnamon for flavor and fragrance enhancement.