Preheat your oven to 180°C/160°C Fan. Grease a large baking dish generously with butter and set aside. Boil your kettle.
Combine the top ingredients together with a whisk- excluding the boiling water and lemon juice.
Combine all the cake ingredients together and whisk until smooth. This will be quite a thick batter so don't worry. Add the batter to the greased baking dish, then add the mixed lemony cornflour mixture over the top.....Using the back of a large spoon, pour over the boiling water and the juice of the 2 lemons
Carefully transfer to the oven and bake for 30-32 minutes. The top should be lovely and crispy. Dust with a generous sprinkling of icing sugar. Serve with cream or ice-cream.
