I use this as a filling for homemade chocolates - my Chocolate Snowballs.
1 1/2 cups butter
2 cups nuts -- chopped
6 ounces semisweet chocolate chips
4 cups sugar
1 Can evaporated milk
2 cups miniature marshmallows
Place butter, nuts and chocolate chips in large bowl and set aside. Cook sugar, and milk till soft ball stage. Add marshmallows and stir till melted. Pour into bowl of butter mixture. Stir till mixed well. Pour into greased pan and keep chilled.