Use cornstarch as you would flour when making dough. Dust your work surface, hands, rolling pin, and cutters. Line a cookie sheet or tray with parchment paper or a non-stick baking mat. TIP! Always make extra fondant decorations as backup!
Knead the black fondant in your hands to make it soft and pliable and roll to ¼"/0.5cm thick.
Using a 2"/5cm round cookie cutter, cut out 48 black circles for Mickey's ears.
Place the black circles onto the prepared cookie sheet. Leave to dry overnight or for 24 hours if possible.
Knead the blue fondant in your hands to make it soft and pliable and roll to ¼"/0.5cm thick.
Using a sharp knife and the Sorcerer's Hat template, cut out 24 hats.
Place the blue hats onto the prepared cookie sheet. Leave to dry overnight or for 24 hours if possible.
To make the bows, use a silicone bow mold and dust the mold with cornstarch each time you make a fondant bow. The bows should be about 2"/5cm wide.
Pinch off a small piece of red fondant and press into the bow mold cavity. Carefully remove from mold and set on the cookie sheet to dry overnight or for 24 hours if possible. Repeat to make 24 bows total.
To decorate the hats after they have dried, place a moon and stars stencil on top of the blue circles and lightly spray the silver cake spray to leave the design on the hats. Lightly spray the ears and bows with the spray to give a bit of shine. Set all the decorations aside to dry.
To make the cupcakes, preheat the oven to 180C/350F/Gas 4. Line cupcake pans with 24 cupcake liners and set aside.
Using an electric handheld or stand mixer, place the cake mix, butter, milk, and eggs into a large bowl and mix until combined and smooth.
Use an ice cream scoop to divide the cupcake batter between the liners - about three-quarters full.
Bake for 20 minutes or until an inserted toothpick comes out clean.
Leave to cool in the pan for about 5 minutes before transferring to a wire rack to cool completely before decorating.
To make the frosting, use an electric stand or handheld mixer and add the butter, powdered sugar, cream, and vanilla to the bowl.
Beat on medium speed until creamy and smooth and stiff peaks form.
Transfer 2 cups of frosting into a large piping bag fitted with a star tip. Set aside.
Pour the red, blue, and silver sprinkles into a bowl and stir to mix.
Use a medium ice cream scoop to place a scoop of frosting on top of each cooled cupcake and use an angled spatula or knife to smooth and flatten slightly.
Dip and roll the frosted cupcakes into the sprinkles to cover.
Using the prepared frosting bag, pipe a swirl of frosting on top of the sprinkles layer.
Place a red fondant bow in the center of the frosting. Then gently place a hat behind the bow, and the ears behind the hat on either side of the bow.
Enjoy and Have a Magical Day!