If these words don't bring you out in the ridiculous 100+ weather, then you're not human.
It's not the only reason to go, but from May to about October, you're going to have ice cream friendly weather. Why not take advantage of the place when you want ice cream? They have a toppings bar, although not everything is vegan. The ice cream is weighed and you can enjoy your cold concoction on your way home or at one of the tables. The ice cream reminds me of old school vegan ice cream. It's not as creamy as the stuff from Spiral.
They also have a number of vegan grocery items, like the vegan cheese crackers. If you hate Whole Foods, but still need your cheese crackers, you're in luck.
If you're in the area, check the place out and head towards White Rock lake to enjoy your vegan ice cream with some nice scenery.