Using a sharp knife, cut the candy bars into 1/2 to 1-inch chunks. You should have about 1 cup.
Place the chucks in a bowl, cover and freeze.
Whisk the egg in a mixing bowl until light and fluffy, 1 - 2 minutes.
Whisk in the sugar, a little at a time, then continue to whisk until completely blended, about 1 minute more.
Pour in the cream, milk, vanilla, and whisk to blend.
Transfer the mixture to ice cream maker and freeze following manufacturer’s instructions.
After the ice cream stiffens (about 2 minutes before it is done) add the candy, then continue freezing until the ice cream is ready.