Red Velvet Poke Cake--Very tasty and cheap to make. I used Duncan Hines Red Velvet Cake Mix, Jello Cream Cheese pudding, and Cool Whip, and it was still only a few bucks to make. The cake has to cool/set in the fridge for about 2 hours.
Pecan Pie Brownies - homemade brownie batter is topped with pecan pie filling. Once baked, the two layers melt into one another, creating a crunchy, nutty pecan crust atop a moist, chocolatey brownie base.