Cake with Banana and Chocolate !!!

INGREDIENTS:
2 cups flour
3 eggs
1 cup sugar
½ cup milk
½ cup vegetable oil
1 tbs baking powder
1 tbs vanilla powder
3 tbs cocoa
Ingredients for the Mole Cake custard:
3 cups milk
3 tbs corn starch
3 tbsw flour
1 tbs vanilla
1 tbs butter
½ cup sugar
80 g (2.8 oz) chocolate
1 pack instant whipping cream
1 cup cold milk

-DIRECTIONS FOR THE SPONGE CAKE
first,transfer the eggs into a large bowl,
add sugar and beat until  foamy,
add milk vegetable oil and vanilla powder
keep beating
add half of the flour  cocoa baking powder sifting
sift and add rest of the flour
baking paper
bake for approx  25minutes on 360f  180c pre-heated oven
you can check if its  baked by dipping a toothpick
let it cool down
when it cools down take tje cake out
hollow out inside of cake with a kinife  leaving a 1l2 to inch ring around the outside  and leave the bottom intact

-DIRECTIONS FOR THE CUSTARD
transfer the flour starch and sugar in to a wide pan,
add the milk and  turn  the  heat on medium,
keep stirring until thickens,
when it thickens add the butter  and vanilla powder
leave  it for cooling  down

-DIRECTIONS FOR THE WHIPPDE CREAM
prepare the instant whipping  cream with a cup of milk,
mix with the custard,
grind the chocolate,
keep the filling in the fridge for 30min to make it easier to  work  with