Whether you're taking these to the streets as part of a sweet art installation or just want to decorate a room, these cupcakes are not delicious, but they sure are sweet. Keep in mind that this is more of a field guide; feel free to make alterations to suit them to your fancy.
Here's how we made ours:
You will need:
- Plaster of Paris (available at most hardware stores or Target-type places with a hardware or home section)
- Water
- Paint to dye the plaster (we used crafter acrylic paint--the type that is less thick)
- Cupcake cups (we used the silicone kind, but the paper kind work as well)
For the cake part: Mix plaster and water (usually 1 part each, but adjust to a pourable but thick consistency). You can mix up whatever quantity you'd like; generally we will do about 3-4 cups' worth at a time; with 4 ounce cupcake-cups, this will make about 8 or so cupcakes. Add a small bit of water-soluble paint (like a watery acrylic or gouache) in the color that you want the bottom part to be, and mix until the color is to the point you like it. Pour into the cups til they level off at the top.
For the frosting: Do the same plaster mix, but with whatever color you'd like for the frosting (we like pink best--so red paint). You can do slightly less, maybe 2/3 the amount that you used for the cake. Make this "batter" a little bit thicker though (by adding a little more plaster) so that it won't drip off of the sides when applied.
Using a spoon, gently put a spoonful on top of each cupcake, adding another spoonful to get a gentle "tiered" effect on the frosting, which will kind of melt into a pleasing cupcake frosting-y shape.
Optional for if you'd like to add messages: While still wet, insert toothpicks into center of frosting so that it will dry with the toothpick in. You can have the flags attached now or attach them later.
Let them set overnight or until they're hard and dry.