4 tablespoons butter (no substitutes), divided
2 cups blanched whole almonds
3/4 cup sugar
1 teaspoon vanilla extract
1/2 teaspoon salt
Line a baking sheet with foil. Grease the foil with 1 tablespoon butter; set aside. In a large heavy skillet, combine the almonds, sugar and remaining butter. Cook and stir over medium heat for 6-8 minutes or until sugar is golden brown.
Remove from the heat; carefully stir in vanilla. Spread onto prepared baking sheet; immediately sprinkle with salt. Cool before breaking into pieces. Store in an airtight container.