When you need to cool the summer down or brownies would be too heavy try a little homemade granita. You can make granita with practically any liquid but I LOVE watermelon granita as it is not a flavor you normally see.
1. more sugar = less frozen (smaller crystals)
2. more salt = less frozen
3. more frequent stirring= smaller crystals
play around, see what you like. Myself I do these by eye and taste all the time.