Beat butter and sugar until smooth and whitish in colour.
Measure flour and set aside.
In a jug or bowl measure milk, vanilla, pineapple and passion fruit then stir.
Into the butter and sugar bowl mix in half the flour, add the milk mixture, mix then add the rest of the flour until a smooth batter.
Line a 33 X 23cm lamington tray and pour the cake batter evenly in.
Bake in a preheated 175*C oven for 20-25 minutes checking with a skewer.
Turn cake out of pan with 2 cake coolers so the cake does not break.
Use any leftover passion fruit pulp to make a passion fruit icing and ice while still warm then let cool completely.
Serve
Notes
You can use fresh or canned passion fruit pulp.This is a nice moist cake.This does freeze well in an air tight bag or container.