Hi Barbara,
I found two recipes for Vanilla brownies - one with chocolate chips and one without. Hope this fits the bill.
VANILLA BROWNIES
1 c. white sugar
1 c. brown sugar
1/2 c. melted margarine
2 unbeaten eggs
1 1/2 tsp. baking powder
1/4 tsp. salt
2 c. flour
3 Tbsp. milk
1 tsp. vanilla
1 c. chopped nuts
6 oz. pkg. chocolate chips
Mix together sugars, margarine, eggs. Add baking
powder, salt and flour. Mix well. Add milk, vanilla, nuts and
chips. Mix and bake in a 9 x 13-inch greased pan at 350 degrees for
25 to 30 minutes.

VANILLA BROWNIES
1 box yellow cake mix
1 egg
1 stick margarine, melted and
cooled
1 c. pecans, chopped
1 (8 oz.) cream cheese
2 eggs
1 box powdered sugar
Mix dry cake mix with egg, margarine and pecans. Press
in sheet cake pan, 9 1/2 x 13-inches. Mix cream cheese, eggs
and powdered sugar. Beat well and pour over cake. Bake at
325 degrees for 35 or 40 min