Color the fondant a light blue color. The easiest way to do this is to put on food grade disposable gloves and add a small amount of gel coloring to a ball of fondant with a toothpick and then use your hands to work the color in, kneading and squish it to fully incorporate the color.

Roll the fondant evenly and thin. Use small flower gum paste cutter to cut small flower shapes. Use a gum paste tool to shape the flowers into 3 dimensional shapes. Add a small dot of royal icing to the center of each flower and place a sugar pearl on top.

Prepare the Wilton Wonder Mold cake pan according to package directions. Grease and flour two 8- or 9-inch round cake pans. Attach magic baking strips around the pans if desired.

Prepare the cake batter according to package directions. Pour 1 box of batter into the Wilton Wonder Mold pan and divide the other box worth of batter evenly between the two round pans.

Bake the Wilton Wonder Mold cake according to the instructions that come with the pan. Bake the round cakes according to the instructions on the box, which will vary depending on the mix and the size and finish of the pans.

For the Wilton Wonder Mold cake, follow package instructions for how to unmold the cake. For the round cakes, allow them to cool for 10 minutes then carefully turn over onto cooling racks and allow to cool completely.

Add buttercream on top of the round cake and smooth evenly into a thin layer. Stack the Wonder Mold cake on top with the dome facing up. Trim the top edges of the round cake as necessary to make the entire cake a dome shape.

Lightly apply buttercream to the entire exterior of the cake.

Undress the Cinderella doll and wrap her legs and torso in plastic wrap to protect her from the cake and frosting. Carefully slide her into the top of the cake, straight down the middle.

Color a large portion of fondant with blue food coloring gel to make 2 shades of blue: a medium blue and a light blue.

Using a fondant rolling pin or regular rolling pin, roll out the fondant into a thin, even layer large enough to cover the front half of the skirt with the dark blue and the back half of the skirt with the light blue. Cut the fondant as needed with a sharp knife.

Gently apply the fondant to the surface of the cake, pressing carefully to adhere the fondant to the cake through the buttercream.

Roll out a small piece of medium blue fondant to cover the doll's torso. Cut moon shapes of the lighter fondant for the little flaps on the side of the dress that come out from each side of her waist. Roll a thin piece of medium blue fondant into a long snake and then form into a bow to place at the back of her waist. Do the same with the light blue fondant to make straps on her dress. Customize the dress to your desired vision.

Using small dots of royal icing, adhere the gum paste flower and royal icing flowers to the skirt of the dress, along her waist, and along the neckline of the dress.

To finish, remove the waxed paper strips from the bottom of the cake and discard. Pipe a line of buttercream around the bottom of the dress where it meets the cake plate. Stick gum paste flowers in the buttercream to decorate. Use a small food grade paint brush to apply edible shimmer dust all over the fondant to add some sparkle.