This goes towards explaining it...

When Eddie and I first met (those 20 years ago), I was rather amazed by his limited exposure to different types of food (say any of those not based on cheese).
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A map in Huffington Post (world master of meaningless maps) goes aways in explaining this.  It shows the most disproportionally popular food.  Let us look at California:

California

1. Taiwanese -- 264 percent higher than national average.
2. Filipino -- 226 percent higher than national average.
3. Vietnamese -- 143 percent higher than national average.
4. Korean -- 143 percent higher than national average.
5. Hawaiian -- 125 percent higher than national average.

That means that that we eat a hell of a lot more of these foods than average.  And this is only the top five where we are above the national average.
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So what are Wisconsin's top five disproportionally popular foods.  And what do you mean, Scott, when you say this explains a lot?
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Let's look and see.

Wisconsin

1. Traditional American -- 52 percent higher than national average.
2. Soup -- 34 percent higher than national average.
3. New American -- 25 percent higher than national average.
4. Sandwiches -- 21 percent higher than national average.
5. Pizza -- 20 percent higher than national average.

Full listing here.