I was shocked to find out that there are actually quite a few people who have never had custard...but if they come to Wisconsin and they want the best there is, they need to go to Kopp's.
I am not sure what it is, but their custard and burgers just always tastes a little better then everyone elses. A chocolate malt is to die for...you don't even need any other food! Another favorite is the turtle sundae.
The flavors change every single day and are absolutely delicious. There is another location on Port Washington Rd. as well.