Dulce de Leche: Let the can of condensed milk, closed, simmer gently for 3 hours. Then let cool in water.
Base: Crumble the cookies in a food processor. Add melted butter, vanilla, and salt. Mix until a consistency resembling fine sand is achieved.
Divide the cookie mixture into a round baking pan lined with plastic wrap. Create a rim of 2-3cm, ensuring the base is evenly covered. Press firmly and let set for 1 hour in the refrigerator.
Filling: Whip the cream until soft peaks form with icing sugar and vanilla powder.
Cut the bananas into 3cm pieces. Place them on a baking sheet, sprinkle with fine sugar, and caramelize with a torch. Let cool.
Pipe the cooled dulce de leche over the cookie base, then place the caramelized bananas on top. Ensure they fit well together. Remove the baking pan.
Cover with whipped cream and generously sprinkle with cocoa powder.
Tips
Remaining Dulce de Leche? Delicious on pancakes, waffles or for breakfast topping.