http://www.amazon.com/PB2-Powdered-Peanut-Butter-6-5/dp/B002GJ9JWS
$6.88 + tax per unit on Amazon.

85% less fat calories than traditional peanut butter.
Mix 2 tbsp of PB2 with 1 tbsp of water and stir until smooth.
Great for baking and smoothies!

$6 for one unit; $10 for two units; $13 for three units; $16 for four units.
Pick up on campus.