Mix the cornstarch with 15 ml milk to make a smooth slurry.
In a saucepan, combine milk, lemon juice, sugar, butter, cornstarch slurry and cook on low-medium heat, whisking continuously.
Keep cooking until the mixture thickens and becomes glossy.
Take it off the heat
Add a tiny pinch of turmeric for that beautiful yellow colour, if you like.
Once it cools down, blend it until smooth
