Heat oven to 350°F. Grease 9-inch square baking pan. (I used an 7 inch one)
Stir together butter, sugar and vanilla in bowl. Add eggs; beat well with spoon. Stir together flour, cocoa, baking powder and salt; gradually add to egg mixture, beating until well blended. Spread batter evenly in prepared pan.
Bake 20 to 25 minutes or until brownies begin to pull away from sides of pan. Cool completely in pan on wire rack. Cut into squares and serve.
The nutrition information provided are only estimates based on an online nutritional calculator. This is not a comprehensive list of all the nutrients in the recipe (i.e., does not include vitamins, cholesterol, etc). I am not a certified nutritionist. Please consult a nutritionist or doctor for accurate information and any dietary restrictions and concerns you may have.