Chocolate Snowswirls Fudge

Ingredients:
4 tbsp butter or margarine
3 cups semi-sweet chocolate chips
1 (14 oz) can condensed milk
1 1/2 tbsp vanilla extract
dash of salt
1 cup chopped nuts
2 cups miniature mashmallows


Directions:
1. In a saucepan, melt the chocolate chips.
2. Add condensed milk, 2 tbsp butter, vanilla and salt.
3. Remove from heat; stir int he nuts, spread evenly into 8 or 9 inch square pan.
4. Melt marshmallows with remaining 2 tbsp butter and spread on top of fudge. With table knife or spatula, swirl through top of fudge.
5. Refrigerate for 2 hours until firm. Cut into squares.


Source: Alaska