First introduced at the St. Louis Exposition of 1904, the classic recipe for Rice Krispies Treats has existed for more than 90 years, and is a familiar dessert for many American children and adults. Though the dessert is traditionally made into uniformly square pieces, due to its simplicity, the recipe can be adapted to make a variety of shapes and figures. With the correct cooking and forming techniques, you can even make an edible Rice Krispie disco ball.
Make the original Rice Krispie Treat recipe either on a hob or in the microwave. On the hob, melt 3 tbsp of butter or margarine in a saucepan. Add 40 regular-sized marshmallow or 4 cups of miniature marshmallows to the pan and stir until fully melted. Remove the pan from heat and add 6 cups of Rice Krispies cereal and mix until fully incorporated. In the microwave, melt the butter and marshmallows in a microwave-safe bowl for two or three minutes until melted, then add the Rice Krispies cereal and mix.
Dump the contents of the bowl onto a sheet of waxed paper. When it is cool enough to touch, form the mixture into a large ball, reserving a small clump of extra mixture.
Form the remaining mixture together into a tiny ball. It can be the size of a marble, but it doesn't necessarily have to be circular. It can even be flat. You just need a little bit of extra mixture left over from the main ball so that you can feed a line into it from which you will hang the main ball. Using a needle, feed a piece of fishing line or twine through the extra bit of mixture as it is too difficult to run a needle and line through the large ball. Then tie a knot securing the line or twine around the extra mixture and remove the needle. Now you have a little clump of Rice Krispie mixture with a line hanging out of it. Press this clump of mixture into the large disco ball piece and form the mixture (that has the line in it) around the disco ball form so that it becomes part of the disco ball form.
Allow the ball to fully cool. This could take several hours at room temperature.
Decorate the ball to look like a disco ball. The actual look of the disco ball is completely up to your personal preference. One option is to coat the entire ball with white icing or white fondant. Then, sprinkle edible silver or gold disco dust or circular sprinkles over the entire ball. If the occasion is very special, or you have a large budget to work with, then consider laying sheets of edible gold or silver leaf over the ball.
Hang the disco ball from its line by attaching it to the ceiling with a cup hook or removable hook.