Best Costco Frozen Food: Clovis Farms Organic Smoothie Blend ($13)
It's hard to choose a favorite frozen fruit at Costco . . . the strawberries, the blueberries, the mango . . . it's all good as a base for a filling smoothie. This particular three-pound organic super smoothie mix contains all the fruits you love: strawberries, raspberries, bananas, and blueberries.