Cracklies

1 tablespoon butter
1 cup molasses
1 cup granulated sugar
1/2 teaspoon salt
3 quarts popped corn
1/2 teaspoon salt

Melt butter. Add molasses, sugar and salt. Boil to the hard crack stage (285 - 290 degrees F). Pour over corn, stirring while pouring. Spread in thin layer to cool. Break into pieces.