For base layer. First blend biscuits & butter together in a blender... or crush biscuits & add melted butter in it.

For second layer. Take whipping cream & make a layer on biscuits

On top of biscuits add a layer of sliced banana

Pour a table spoon full of caramel sauce to coat the bananas nicely

Now add another layer of whipped cream & top it with chocolate shavings or cocoa powder