| 1 | Combine first 8 ingredients with electric mixer on medium-high. |
| 2 | Beat 3 minutes scraping down sides of bowl often. |
| 3 | Remove beaters. |
| 4 | Stir in last 3 ingredients. |
| 5 | Grease and flour 9"square pan. |
| 6 | Spread batter evenly in pan. |
| 7 | Bake at 325°F about 50 minutes. |
| 8 | Cool in pan about 30 minutes. |
| 9 | Frost with cream cheese frosting and sprinkle with additional walnuts. |
| 10 | Icing-cream the cream cheese with the butter until light and fluffy, using med-high spped of electric mixer. |
| 11 | Add half of the sugar, increasing speed to high. |
| 12 | Add extract and peel and beat about 1 minute. |
| 13 | Scrape down sides of bowl often. |
| 14 | Resume beating adding remaining powdered sugar. |
| 15 | Beat smooth. |
| 16 | Frost sides and top of cake. |