Best soft moist banana cake & this is the cake inspired by Peppa Pig

Banana Cake:


SPONGE
granulated sugar (133g)
1/3 cup vegetable oil (60g)
1 large egg
1 tsp banana essence
1/2 cup buttermilk (120g) - mix 1/2 cup whole milk with 2 teaspoon vinegar or lemon juice to make your own
2 tsp vinegar
1/3 cup boiling water (60g)
3 cups all-purpose flour (140g)
1/2 tsp baking soda
1 tsp baking powder
1/8 tsp salt

FROSTING
3/4 cup Whipping cream
1tsp banana essence
1 drop Yellow food colour