Freezing your spinach is a great way to keep your greens ready. Freezing an entire bag of fresh spinach doesn't work as well as blending and freezing because freezer burn gets to the leaves. Here's a clever little trick I use to save money while always having spinach ready for cooking! By the way, these spinach cubes can be used for FAR more than smoothies. Throw them into your soups, sauces, EVEN BROWNIES, for an extra dose of phytonutrients.