Colorful fruit-covered trailer brings tasty, fat-free frozen yogurt and locally sourced ingredients to 78704.. In Short It's a familiar scene to froyo lovers, but these South Austin entrepreneurs also keep it health conscious with local-made ingredients like fat-free, organic frozen yogurt courtesy of White Mountain, plus organic fruits and wheatgrass. Choose from tart plain or green tea yogurt, and your choice of toppings including fruit, granola, chocolate chips, nuts and Cap'n Crunch cereal. The menu also offers a variety of 100 percent fruit smoothies with fat-free frozen yogurt, immunity and energy-boosting add ins and fresh-squeezed juice. Stop by at lunchtime and augment your order with an all-natural chicken sandwich or tofu salad sandwich served on whole grain bread.