Place the butter into a jug and heat in the microwave until melted, remove and allow to cool slightly.
Add 2 tbsp of golden syrup and milk to the jug and whisk together, then add the egg and mix again.
Combine 50 grams of the brown sugar and all of the flour in a bowl.
Pour the wet ingredients into the bowl with the flour and sugar mixture. Mix together until well combined. (no need to use a mixer)
Combine the remaining 1/2 cup of brown sugar and cornflour in a small bowl and mix together well.
Sprinkle over the pudding mixture.
In the jug, measure the boiling water and add the the remaining 2 tbsp of golden syrup, mix together to melt the golden syrup.
Take care and pour over the top of the pudding mixture, you need to the water to sit on top of the pudding mixture.
Bake for 40, until you have a nice crust on the top, you can test with a skewer but do not push all the way down as you should expect to have the sauce on the bottom too.
Serve with double cream or ice cream.
Serve when you bring out of the oven, just add some cream and/or ice cream.