Preheat the oven to 350°F (175°C).
Prepare the chocolate cake mix according to the package instructions.
Pour the batter into cupcake liners and bake for 18-20 minutes.
Allow the cupcakes to cool completely.
Frost the cooled cupcakes with buttercream frosting.
Roll out the black fondant and cut it into rectangles to resemble the cover of a composition notebook.
Use white fondant to create the lines and label on the notebook cover.
Decorate the fondant with edible markers for added detail.
Place the fondant pieces on top of the frosted cupcakes.
Serve and enjoy your creative composition notebook cupcakes!