Cut the key lime pie bars into small pieces that are about 1/4 inch squares. Place the ice cream mixture into your ice cream machine (click HERE to find the one I love AND it is 1/2 off the original price!!!) and churn for about 20 minutes or according to your ice cream maker’s directions. Once the ice cream is set and almost finished churning, add in the pieces of key lime pie bars. Churn another minute or two. Freeze until set.