Mix Packets & Flavor with Sweet Leaf
Sweet Leaf Flavored Extracts are awesome and a life saver. They are expensive but really enrich the flavor of the shakes. I use 1/2 packets all the time.
1/2 vanilla, 1/2 orange with Sweet Leaf Valencia Orange -
Vanilla with Sweet Leaf Rootbeer
1/2 cappuccino / 1/2 vanilla with Sweet Leaf English Toffee
There are lots of possibilities.