My sister in law Dana sent me this recipe, which is perfect if you've got not much time and want something sweet.
I made them in an 8x8 pan, because I wanted thicker brownies, and just increased the baking time.
1 (21.5-23.7 oz) package fudge brownie mix
3/4 cup chopped walnuts
1 (8 oz) package cream cheese, softened
2 tbsp margarine or butter, softened
1 tbsp cornstarch
1 (14 oz) can Sweetened Condensed Milk
1 tsp vanilla extract
Preheat oven to 350 degF. Prepare brownie mix as package directs, stir in nuts. Spread into a well greased 13x9 inch baking pan. In mixer bowl, beat cheese, margarine, and cornstarch until fluffy. Gradually beat in sweetened condensed milk, then egg and vanilla until smooth. Pour evenly over brownie batter. Bake 35-40 minutes or until top is slightly browned. Cool; chill. Garnish as desired. Cut into bars. Store covered in refrigerator.