Heat oven to 350 degrees or 325 degrees for dark or nonstick pan. Pam spray a
13 x 9 inch baking pan and dust with flour. In large bowl, beat cake ingredients with electric mixer on low speed 30 seconds. Beat on medium speed 2 minutes. Pour into pan. In large bowl, beat cream cheese, sugar and 1 egg on medium speed until smooth and creamy. Stir in chocolate chips. Spoon filling by tablespoonfuls evenly over top of batter. Using table knife, swirl filling through batter. Sprinkle with nuts. Bake 40 to 45 minutes or until toothpick inserted in center comes out clean. Cool. Bake 40 to 45 minutes or until toothpick inserted in center comes out clean. Cool completely, about 1 hour. Spread frosting over cake. Store covered in refrigerator.
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