Chocolate Chip Cookie Surprise Cake

Source: Betty Crocker

1 box Betty Crocker Supermoist yellow cake mix
1 cup milk
1/2 cup butter or margarine, melted
3 eggs
1 pouch Betty Crocker chocolate chip cookie mix
1/2 cup firm butter or margarine, softened
1 egg
1container Betty Crocker Rich & Creamy chocolate frosting

Heat oven to 350 degrees F. Generously grease bottom only of 15 x 10 x 1-inch pan; lightly flour.

In large bowl, beat cake mix, milk, melted butter and 3 eggs on low speed 30 seconds; beat on medium speed 2 minutes. Pour into pan.

Make cookie mix as directed on package using softened butter and 1 egg. Drop dough by teaspoonsful evenly over batter in pan.

Bake 35 to 40 minutes or until wooden pick inserted in center comes out clean. Run knife around side of pan to loosen cake. Cool completely, about 1 hour.

Spread frosting over top of cake. Store loosely covered at room temperature.

15 servings.

High Altitude (3500-6500 ft): Heat oven to 375 degrees F. For cake mix, increase milk to 1 1/4 cups; decrease butter to 2 tablespoons; add 1 tablespoon all-purpose flour. For cookie mix, add 1 tablespoon all-purpose flour.