Prepare the French vanilla pudding according to the package directions.
Pour the caramel Frappuccino into a shallow bowl.
Dip each ladyfinger into the Frappuccino for about 5 seconds, then arrange the ladyfingers in a single layer in a small square baking dish.
Spread a layer of prepared French vanilla pudding over the ladyfingers.
Repeat the layers two more times, or until all of the ladyfingers have been used.
Sprinkle the top evenly with cocoa powder.
Refrigerate for at least 3 hours before serving.