Put everything in a blender and blend it until it's smooth. If it's too thick, add a bit more pineapple juice. If it's too thin, add a bit more ice cream, or stick it back in the freezer for a few minutes. That's all there is to it!
1 Scoop Vanilla Ice Cream, 4 Oz Pineapple Juice, 2 Cups Frozen Pineapple Chunks