Brownie Mix  $0.30 /mix.  1 Cup Sugar, 1/2 Cup Flour, 1/3 Cup Cocoa, 1/4 tsp Salt, 1/4 tsp Baking Powder.  Add:  2 Eggs, 1/2 Cup Vegetable Oil, 1 teaspoon Vanilla.  Bake @ 350 degrees for 20-25 minutes. Doin&#39; it!