Combine vinegar with hot water and add a 2-3 drops of food coloring. Let the eggs absorb the dye for as long as desired.
Make sure the eggs are completely dry (1-2 hours) before moving onto the next step.
Fill the eggs 1/2 full with pre-cut confetti. Then seal with a small circle of tissue paper.
Learn the "right way" to break open a cascarón by clicking below! (Psst...there is a right way.)