I can't believe it's not Butter! Made with buttermilk for an extra buttery taste. Spread it, melt it, cook and bake with it then lick your lips after tasting it! Spreadable straight from the fridge and at 37 calories per serving, you really won't believe it's not butter! I can't believe it's not Butter! is a vegetable fat spread, made with buttermilk for a truly buttery taste. So tasty and so versatile, it can be used for baking, cooking, glazing and frying or just spread straight onto your morning toast. A delicious alternative to butter at 83% less saturated fat and almost a third fewer calories! A great source of Vitamin D which you and your family can enjoy every day.. Made with buttermilk. Good for spreading, cooking, baking and frying. Suitable for vegetarians. I Can't Believe It's Not Butter!.