Make It
Step 1
Preheat oven to 350° F. Grease or foil-line 8-inch-square baking pan.
Step 2
Combine flour, cocoa and salt in small bowl.
Step 3
Beat butter, granulated sugar and brown sugar in large mixer bowl until creamy. Add 2 eggs, one at a time, beating well after each addition. Add vanilla extract; mix well. Gradually beat in flour mixture. Reserve 3/4 cup batter.
Step 4
Spread remaining batter into prepared baking pan. Spoon dulce de leche over batter. Beat remaining egg and reserved batter in same large bowl until light in color. Spread evenly over dulce de leche.
Step 5
Bake for 25 to 28 minutes or until center is set. Cool completely in pan on wire rack. Cut into bars.