ine the base of a cake pan .
in a heavy another pan bring sugar to caramelized on low heat.
pour the hot caramel into the prepared pan and then top with an even layer banana slices .
sift the flour,baking powder, baking soda , salt .
with your electric mixer , mix the butter with sugar until fluffy then add eggs gradually,banana flavor ,milk, heavy cream .
add the flour gradually and keep mixing.
spoon the mixture carefully out over the bananas , smoothing out the top .
rest the cake tin on a deep baking tray ,
pour 1 large hot water int the tray.
place in a preheated 180 c to bake for 35 minutes,
let the cake to cool completely before serving.