Caramel-rum sauce: In a sauce pan combine the water and sugar and cook until caramel in color. Slowly add in the cream and then the rum. Allow the sauce to cool and add sliced bananas if you wish.
Chocolate fudge sauce: Combine the cream and corn syrup and bring to a boil. Once boiling add the remaining ingredients, remove from the heat and whisk until all of the chocolate is melted and the sauce is smooth.
Tuile batter: Preheat oven to 350 degrees F. Combine all of the dry ingredients and add to a stand mixer fitted with a paddle attachment. Mix in the egg whites and then the melted butter. Spread or pipe the batter onto a silpat and bake in oven for 5 to 10 minutes.
Whipped cream: Place the cream in a stand mixer and whip on high speed, once at a medium peak add the sugar and vanilla extract.
To assemble the sundae: Place the caramel rum in the bottom of a sundae glass. Layer scoops of your favorite ice cream on top and pour the fudge over the ice cream. Repeat until the glass is full. Top with whipped cream, toasted nuts and a tuile cookie. To assemble the sundae, place the caramel rum bananas in the bottom of a sundae glass. Layer scoops of your favorite ice cream on top and pour the fudge on to the ice cream. Repeat until the glass is full. Top with whipped cream, toasted nuts and the tuile monkey cookie. A viewer, who may not be a professional cook, provided this recipe. The Food Network Kitchens chefs have not tested this recipe and therefore, we cannot make representation as to the results.