Start by baking a Bundt cake. (Some people use a metal mixing bowl to bake the cake instead.) Once it is completely cool, place a clean doll into the center of the cake. You can use some icing in the center to help hold her in place. Then, cover the cake in pastel icing by piping rosettes all over it. Frost the bodice of the doll in the same way so she matches. You may add contrasting icing, sprinkles or dragees for extra decoration.