2 tsp. butter, softened * 1 can (14 oz.) sweetened condensed milk
4 cups pretzel sticks * 1/8 tsp. salt
2 ½ cups pecan or almond, toasted and coarsely chopped
1 tsp. vanilla extract * 2 ¼ cups packed brown sugar
1 pkg. (11 ½ oz.) milk chocolate chips * 1 cup butter, cubed
1 Tbsp. plus 1 tsp. shortening, divided * 1 cup corn syrup
1/3 cup white baking chips
Line a 13x9 inch pan with foil; grease foil with softened butter. Spread pretzels and nuts on bottom of prepared pan.
In a large heavy saucepan, combine brown sugar, cubed butter, corn syrup, milk and salt; cook and stir over medium heat until a candy thermometer reads 240 degrees (soft-ball stage). Remove from heat. Stir in vanilla. Pour over pretzel mixture.
In a microwave, melt chocolate chips and 1 Tbsp. shortening; stir until smooth. Spread over caramel layer. In microwave, melt baking chips and remaining shortening; stir until smooth. Drizzle over top. Let stand until set.
Using foil, lift candy out of pan; remove foil. Using a buttered knife, cut the candy into bite-size pieces.