Sassy's Chocolate Peanut Butter Banana Protein Shake (300 calories)

In a blender:

1 c skim milk
1 scoop protein powder (I like the Whey Gourmet brand, especially the chocolate peanut butter flavor)
2 tbs unsweetened dark cocoa powder (I use Hershey's Special Dark brand)
Few sprinkles of cinnamon (about 1/2 tsp)
1/2 frozen ripe banana
1 ice cube

Blend and enjoy! (300 calories)