Cream Cheese Brownies from scratch

This recipe is pretty close to the Cream Cheese Brownies that I have made for years using a cake mix. 

Cream Cheese Swirl Brownies   
3 eggs
6 tablespoons reduced-fat stick-margarine*
1 cup sugar, divided
3 teaspoons vanilla extract
1/2 cup all-purpose flour
1/4 cup baking cocoa
1 package (8 ounces) reduced-fat cream cheese
DIRECTIONS
Separate two eggs, putting each white in a separate bowl (discard yolks or save for another use); set aside. In a small mixing bowl, beat margarine and 3/4 cup sugar until crumbly. Add the whole egg, one egg white and vanilla;a mix well. Combine flour and cocoa; add to egg mixture and beat until blended. Pour into a 9-in. square baking pan coated with cooking spray; set aside.
In a mixing bowl, beat cream cheese and remaining sugar until smooth. Beat in the second egg white. Drop by rounded tablespoonfuls over the batter; cut through batter with a knife to swirl. Bake at 350° for 25-30 minutes or until set and edges pull away from sides of pan. Cool on a wire rack. Yield: 1 dozen.
Originally published as Cream Cheese Swirl Brownies in Quick Cooking July/August 2003, p27

https://www.tasteofhome.com/recipes/cream-cheese-swirl-brownies