In a medium bowl, combine the ricotta cheese, mascarpone cheese, powdered sugar, vanilla extract, and cinnamon. Mix until smooth and creamy.
Gently fold in the mini chocolate chips until evenly distributed.
Spoon the cannoli filling into each mini phyllo pastry cup, filling them generously.
If desired, sprinkle chopped pistachios or chocolate shavings on top for garnish.
Chill the filled cups in the refrigerator for at least 30 minutes before serving to allow the flavors to meld.
Serve chilled and enjoy your delicious mini cannoli cups!