Brownie Cheesecake Bars

1 1/2 c All-purpose flour
1 1/2 c Sugar
2/3 c Butter or margarine; melted
2/3 c Cocoa
3 Eggs; divided
1/2 c Milk
3 tsp Vanilla extract; divided
1/2 tsp Baking powder
1 c Chopped Nuts; optional
1 pkg (8 oz)cream cheese; soft
2 tb Butter or margarine
1 tbl Cornstarch
1 can (14 oz)Sweetened condensed milk

Instructions:

Preheat oven to 350 degrees.
Grease 13 x 9-inch baking pan.
In mixer bowl beat flour, sugar, melted butter, cocoa, 2 eggs, milk, 2 tsp. vanilla and baking powder until well blended.
Stir in nuts.
Spread into pan.
In small mixer bowl, beat cream cheese, 2 T butter and cornstarch until fluffy.
Gradually add sweetened condensed milk, then remaining 1 egg and 1 tsp. vanilla, beating until smooth.
Pour over brownie batter.
Bake 35 to 40 minutes or until top is lightly browned.
Cool; refrigerate.
Cut into bars.