Creamy Vanilla Pudding Delight

In a saucepan, mix sugar, cornstarch, and salt.
Gradually whisk in the milk until smooth.
Cook over medium heat, stirring constantly, until the mixture thickens and starts to boil.
In a separate bowl, beat the egg yolks. Gradually whisk in a few spoonfuls of the hot mixture to temper the eggs.
Slowly add the egg mixture back into the saucepan, whisking constantly.
Cook for another 2–3 minutes until thickened.
Remove from heat, stir in butter and vanilla extract.
Pour into bowls and let cool. Serve warm or chilled.