This is just slightly sweet if you use the 1/2 cup of sugar called for the recipe, which is the way we like it. If you like it sweeter, use 2/3 of a cup. Our grandson said it tasted like candy that way!
You don’t want to overcook it, or it won’t be as creamy when it is chilled. I find that 30 minutes of simmering is just right. If serving it warm, you might want to let it sit for a few minutes to thicken up first.