Put on medium heat and cook until the cream thickens slightly, stirring constantly with a whisk. To get a beautiful saturated color, you can use turmeric or a drop of yellow gel dye.
The still warm cream will be slightly watery, but when cooled it will reach the desired consistency. Let it cool completely at room temperature.
The cream is quite versatile. They can be stuffed with cookies, pies, spread on toast.
It can be stored in the refrigerator for several days, covered with a food film in contact with the surface. You can also freeze the cream and then defrost it in the refrigerator as needed.