The Best Brownies

This recipe from Hershey's Cocoa Cookbook is really the best for me as it uses oil which means I can bake it anytime. No need to melt butter.

1/2 cup vegetable oil or melted butter
3/4 cup sugar
1 teaspoon vanilla (or Kahlua)
2 eggs
1/2 cup unsifted all-purpose flour
1/3 cup cocoa
1/4 teaspoon baking powder
1/4 teaspoon salt
1/2 cup chopped nuts (optional)
Condensed milk (optional)

1. Heat oven to 350°F. Grease 9-inch square pan.
2. In a large bowl, combine oil, sugar and vanilla. Add eggs; beat well with a spoon.
3. Combine flour, cocoa, baking powder, and salt; gradually add to egg mixture until well blended. Stir in nuts. Spread in pan.
4. If using condensed milk, spoon it over the batter and swirl with a butter knife.
5. Bake for 20-25 minutes or until brownie begins to pull away from edges of pan. Cool in pan then cut into squares.