The Mara sells a 4-pack of BabyCakes mini brownie cupcakes with 4 frosting flavors (chocolate, vanilla, mocha, and mint - one of each) in the refrigerated desserts cooler. Four 1- or 2-bite brownie cupcakes for $3.49.
This is the same thing that has started to appear at several resort QS locations around property. They're not near as good as the cupcakes or brownies available at the bakery in DTD, but the convenience is nice (and if you let them come up to room temperature a bit they're significantly better).