Thanks to this season's presenting sponsor, Kohler, they design innovative sinks and faucets

for people who do their best work in the kitchen.

Gold! A striking ranch! I'm a billionaire!

There's gold to be found in the hills of Wisconsin.

Not shiny nuggets specifically and not cheese, if that's what you're wondering,

but a tantalizingly lucrative crop that can earn $7,000 in acre.

That's 10 times the going rate of your average farm crop.

You'd think everyone in Middle America will be racing to plant it

with an eye towards making a quick fortune, but this isn't happening.

There's a catch, because this crop is a tough nut to crack.

Literally, newbie farmer Mike Trinkline knows.

The story starts about eight years ago when I purchased 35 acres on the shores of Lake Michigan.

I had never farm before, but I thought I was smarter than all the farmers.

I planted a series of high-value crops that I figured would make me a killing.

Blueberries, chestnuts, apples, raspberries, 50 different varieties.

Everything died.

I had become the caretaker of a vast plant graveyard.

But then these unusual orbs started falling out of my house.

Wouldn't you know it? They were black walnuts.

It was a fortunate break from Mike, since black walnuts command a high price,

given their unusual flavor. Black walnuts work with both sweet and savory dishes,

enhancing pork, for example, but also transforming a cake.

...