Old Fashioned Peanut Brittle

Butter a rimmed baking sheet; set aside.
Stir together sugar, 1/2 cup water, and the salt in a medium saucepan.

Ingredient :

Unsalted butter, softened, for baking sheet
2 cups sugar
Pinch of salt
1 ½ cups salted peanuts, 7 ounces
Vegetable oil, for spatula