Pre-heat your oven and cook the puff pastry cups as directed by the packaging.
Add your guava paste to a microwaveable bowl. Melt in 30 second intervals, stirring in between, until it is smooth.
Combine your softened cream cheese, powder sugar, and butter in a bowl. Mix and combine until smooth.
Once the puff pastry cups are done, press the center down to make a hole. Fill the hole with the guava. After, pipe the cream cheese frosting on top. Add the chocolate sprinkles to give the ghost eyes. Serve and enjoy!