Step 1

Heat the cream and milk in a pan until bubbles just start to rise at the edge of the pan (don't boil it).

Step 2

In a jug, mix the egg yolks, cornflour, sugar and vanilla extract.

Step 3

When the cream is hot, pour into the egg mixture in a thin stream whilst stirring (note: stirring, not whisking fast!) with a hand whisk (don’t pour in the milk all at once or it will scramble the eggs).

Step 4

Once mixed together, pour back into the pan and continue to stir the custard with a whisk over a medium heat until it thickens.

Step 5

If it gets too thick, add a splash of cream.

Step 6

Turn off the heat and serve.