Bourbon, also known as “the American whiskey,” has been around since the 18th century, but officially traces its roots to Bourbon County, Ky., where it was first discovered 200 years ago.

Start to finish: 45 minutes. Makes 16 bars. 1 cup pecans, toasted and cooled, plus extra to garnish. 1 cup all-purpose flour. 6 tablespoons (3/4 stick) unsalted butter ...