I know everyone's given up on this long ago, but I'm still doing a modified version of it.

Here's one of my current favorite shake flavors:

1/2 cup strong decaf coffee
1/2 cup unsweetened almond milk
seeds of 8 green cardamom pods (grind them in advance if you don't have a high-powered blender)
1/4 cup eggwhite protein powder
1 tablespoon coconut milk
sweetener to taste

1 cup ice cubes