Step 1

Pour 1 ¼ cups of milk into a heavy based saucepan, and add sugar and vanilla, then heat on low-medium heat until steaming, stirring regularly to dissolve the sugar. Remove from heat.

Step 2

In a large bowl, whisk together the remaining 1/4 cup milk, egg yolks and cornflour until smooth and fully combined.

Step 3

While whisking, very slowly pour the hot milk mixture into the egg mixture in a slow but steady stream. Don’t pour it too quickly or the heat will scramble the eggs.

Step 4

Once everything is combined, return the mix to the saucepan. Heat over medium heat, stirring with a whisk constantly, until it gets very thick and no longer settles into itself when you move it around. This will happen quite quickly after about 5 minutes so it’s important to keep gently whisking increasing intensity as it gets very thick. You will end up with lumpy custard if you don’t.

Step 5

Swap to a silicone spatula and pass the custard through a strainer into a clean bowl, then press plastic wrap to the surface and allow to cool to room temperature.