Playdough

Here's one that probably will cause no weight gain at all. Plus, after all the stirring and kneading your forearms will be buff.

Playdough
1 cup flour
1/2 cup salt
2 tsp cream of tartar
1 T oil
1 cup water
food coloring

Whisk dry ingredients together until blended, then add wet (including coloring). Whisk continuously over medium heat until mixture "coagulates." It will look a lumpy mess for a minute, and you will think that I have given you a bum recipe, but once the dough looks thick, just turn it out onto your counter and knead it a little until smooth.