This cake is for a lymphoma society fundraiser bake sale/silent auction, the Thrilla in Vanilla. The splat/smooth frosting idea came from The Whimsical Bakehouse, and the Oreos = sunflowers idea came from Hello, Cupcake!
The frosting is splatted onto the cake and put in the refrigerator to firm up a bit, then smoothed with a big spatula that's been dipped in hot water.
Too much blending of orange and green makes an icky brown, so you have to be careful.
The centers on the little flowers are chocolate chips. Hello, Cupcake! recommended two layers of petals for the sunflowers, one around the edge of the cookie, and another layer on top of that. The cake is chocolate with an Oreos/buttercream filling. I'm afraid the cookies will be mushy by tomorrow morning, but maybe that will just make it easier to serve…