
Lemon Filling is a sweet, tangy, zesty spread for toast, cookies, cake or just to eat with a spoon! Use it as cake, cupcake or donut filling.
In a small saucepan, add sugar, cornstarch, salt and turmeric (if using). Add water, stir and heat on medium until it comes to a boil, stirring frequently. As it nears a boil, you will notice it thickening up. Once it boils, continue boiling for 1 minute. This fully activates the cornstarch.
Remove from the heat and stir in the zest, lemon juice and butter (if using). Using the butter gives it a smoother and more refined taste, but you can leave it out if you don't want to use it.
Allow to cool completely, pour into a clean small jar, label it and store in the refrigerator.
Makes a little more than 1 cup.