The following are some low FODMAP smoothie ideas. To make them, place all ingredients in the blender and blend until smooth. Feel free to get creative and come up with your own combinations! For a balanced smoothie, try to include a fruit and a vegetable, a source of protein, and a healthy fat (such as coconut oil or peanut butter). A good rule of thumb is to limit the amount of fruit to one serving per smoothie, which generally means one cup of cut-up fruit or one whole piece of fruit, such as a banana. Check the low FODMAP food guide for more guidance regarding specific portion sizes.