Mash the bananas until smooth.

Mix mashed bananas with sugar, milk, vanilla, and lemon juice, veg oil or margarine.

In another bowl, combine flour, baking soda, and baking powder.

Gradually add dry ingredients to wet mixture, mixing until just combined.

Pour batter into a greased cake pan.

Bake at 180°C (350°F), adjusting time as needed until a skewer comes out clean.

Let cool, then wrap with cling film to keep moist.