1/2 c. butter (1 stick)
1/2 c. packed brown sugar
1/4 c. sugar
1 egg
1/2 tsp. vanilla flavoring
1 1/4 c. all-purpose flour
1/2 tsp. baking soda
1/2 tsp. salt
1 (6 oz.) pkg. (1 c.) semi-sweet chocolate chips

Preheat oven to 350 degrees. Grease a 13x9x2 inch pan.

In a large bowl beat butter with electric mixer on medium until softened (about 30 seconds). Add brown sugar and sugar and beat until fluffy. Add egg and vanilla and beat well.

In another bowl combine flour, baking soda and salt. With mixer on low speed, gradually add flour mixture to butter mixture, beating until well mixed. Spread batter in pan. Sprinkle chips evenly over batter.