Secret to flat cakes: wet cake strips (i., Bake Even Strips) and wrap around the cake pans. They act as an insulator to help the cake bake evenly (flat). You can also use strips of towel: drench, wrap around the pans, and bake.
Cake Batter Bark: Melt dark chocolate and spread on parchment. Melt white chocolate and whisk in 3 tsp of white cake batter. Pour white chocolate on dark chocolate. Sprinkle with sprinkles and let harden in the fridge.
Funfetti has always been my FAVORITE cake mix flavor, and cake mix cookies are among my favorite treats, so this looks amazing! Can't wait to try! Six Sisters Stuff: Funfetti Cake Batter Cookies Recipe