Cake batter blondies. 1 box yellow cake mix, 1/4 canola oil, 1 egg beaten, 1/4 to 1/2 cup milk, 1/4 cup rainbow sprinkles, 1/2 cup white chocolate chips (optional) Set oven to 350. Add mix, oil, egg, sprinkles, and white chocolate. Add milk using just enough to combine mix. Put in greased 8x8 pan cook for 25-30 mins and let set for 20.