Brownies - cooking recipe

Ingredients

1 c. margarine
2/3 c. cocoa
2 c. sugar
4 eggs
2 tsp. vanilla
1 c. all-purpose flour
1/2 tsp. salt
nuts (if desired)
chocolate chips (if desired)

Preparation

Preheat oven to 350\u00b0.
Grease a 9 x 13-inch pan.