It does sound interesting. 
Recipes I found:
http://www.cakeclubrecipes.com/cakerecipes/flancake.htm
(This one's in French - perhaps someone would be so kind as to translate.)
http://recipeexchange.tribe.net/thread/a5471cdd-227a-400f-aec9-897087ee916c
(This recipe has cream cheese in the flan.)
http://www.recipecircus.com/recipes/billk54/Cakes__Pies_3/Chocoflan_Cake_.html
(This recipe is in Spanish - translation please.)
http://recetas.mundorecetas.com/receta4337.html
[qThis one's in French - perhaps someone would be so kind as to translate.)
http://recipeexchange.tribe.ne.....7087ee916c
uote]
Here you are JanH
100g flour
1 tsp bicarbonate of soda
a pinch salt
150g butter+ 15g for the pan
7 big eggs
190g sugar
200g chocolate
100g condensed milk
600ml milk
1 vanilla pod
Preheat oven to 2oo degrees
Bring the milk to a boil with the vanilla split lengthwise . Remove .
Seperately, melt chocolate with butter over simmering water. Add 150g sugar and 3 beaten eggs
Add the sifted flour with bicarbonate of soda and salt. Mix until smooth. Set aside.
Preparation of the flan: In a bowl beat 4 eggs with 40g sugar. Remove the vanilla pod from the milk and pour into the eggs while beating continiously. set aside.
Grease a 26cm pan. Pour the condensed milk at the bottom of the pan and then pour the chocolate mixure followed by the flan.
Cover the pan withfoil paper taking care that the foil doesnt touch the flan.
Cook the flan in the oven over a pan of simmering water for 20minutes at 200 degrees. Lower temperature to 180 degrees, remove foil and cook further 30 - 40 minutes.
During baking the chocolate and flan will mix.
Remove from oven and cool a few minutes. While the cake is still warm. remove from pan witha sharp tipped knife. Refrigerate.
Best served cold. Prepare the day before.
BON APPETIT.[/quote]
Whooo Hooo!!!!
Thanks so much, SEAQUEEN. 
You Rule. 
P.S. The temperature is in Celsius. To convert to Fahrenheit:
http://www.cakecentral.com/cake_recipes_file-converter.html
This recipe is in Spanish - translation please.)
one chocolate mix follow box inst.
flan
1 can of evaporated milk
1 can of condensed milk
4 eggs
1 teaspoon of vanilla
follow cake mix inst. and pour in a greased pan, put all the rest of ing. in the blender and blend well
now pour the blender mix on the pan very slowly so they dont mix, now cover the pan with foil.
put inside another pan with hot water and bake at 200 for 45-55 min or until clean tooth pick (it can be done with yellow cake but it tastes much better with chocolate)decorate with caramel and nuts!!!!!
Be careful this is a delicious cake and is highly addictive!!!!!!!!!!!!!!!!
I am going to try the cream cheese version tonight. I will let everyone know how yummy it is after my DH brings it to a work function tomorrow.
http://www.recipecircus.com/re.....Cake_.html
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