Crush the cookies – Place the butter cookies in a food processor or a ziplock bag and crush them into small crumbs.
Blend the creamy mixture – In a blender, combine cottage cheese, sour cream, condensed milk, and vanilla extract. Blend until smooth.
Layer the dessert – In a serving dish or individual cups, start with a layer of crushed cookies, followed by a layer of sliced bananas, and then a layer of the cottage cheese mixture. Repeat until all ingredients are used, ending with the creamy layer on top.
Chill – Cover and refrigerate for at least 2 hours to let the flavors meld.
Finish with chocolate – Drizzle melted dark chocolate over the top before serving. Enjoy chilled!