Dark chocolate cadbury mini eggs with their crunchy sugar shells are one of the few experiment candies I actually eat. That's why these test subjects are the milk chocolate pastels!
We heated the eggs in a low oven. After several minutes, the chocolate expanded and cracked the sugar shell, as if little birds were wriggling their way out.
Fun fact: after they cool down, sometimes the cracks close and reseal
Try this with peanut M&M's too!