Barbara, I made your brownies with a few changes. They are similar to a chocolate cake my aunt made in that it uses 3 cups of flour and same amount of sugar. It makes a big cake. I used butter instead of crisco and used baking soda and slightly soured the milk with 1\2 tsp vinegar. Here is your recipe the way I made it. It turned out great.

Vanilla Brownies

l c. brn sugar
l c. butter
l c. granulated sugar
3 eggs
1-2 t. vanilla
3 c. flour
2 tsp. baking soda
1/4 tsp. salt
1/2 cup milk
1 1/2 c. nuts

bake in 9x13 pan about 35-40 min.
at 350 deg.