|Caster sugar||1 Ounce|
|Cornflour||1 1⁄4 Teaspoon (heaped)|
Mix together the egg yolks, sugar and cornflour.
Warm the milk in a pan until hand hot and pour it onto the egg yolks, stirring constantly.
Return the mixture to the saucepan and cook gently, stirring until it thickens.
Do not allow it to boil or the custard will curdle.
Cool and then use in a trifle.