Sugar Rush - Mrs. Fields Marble Cookies

Six-foot chick was at it again - smile! She bakes at least once a week, frequently, more than that!
This is one of her latest sweet tooth creations:

Mrs. Fields Marble Cookies

2 cups all-purpose flour
1/2 tsp. baking powder
1/4 tsp. salt
1/2 c. light brown sugar, firmly packed
1/2 c. white sugar
1/2 c. salted butter, softened
1 large egg
1/2 c. (4 oz.) sour cream
1 tsp. pure vanilla extract
1 c. (6 oz.) semisweet chocolate chips

Yield: 2 doz.

Preheat oven to 300^oF.

In medium bowl combine flour, baking powder and salt with wire whisk. Set aside.

Combine sugars in large bowl using an electric mixer set at medium speed. Add butter and beat until batter is grainy. Add egg, sour cream and vanilla, and beat at medium speed until fully combined. Scrape bowl. Add the flour mixture, and blend at low speed until just combined. Do not overmix.

Place chocolate chips in double boiler over hot but not boiling water. Stir constantly until melted. Or, place chips in a microwave-proof bowl and microwave on high, stirring every 20 seconds until melted.

Cool chocolate for a few minutes and pour over cookie batter. Using a wooden spoon or rubber spatula, lightly fold melted chocolate into the dough. Do not mix chocolate completely into cookie dough.

Drop by rounded tablespoons, 2 inches apart, onto ungreased cookie sheets. Bake 20-22 min. Do not brown. Quickly transfer cookies to a cool surface.

Oh my! Wouldn't you just love to take a bite out of the extra chocolatey cookie on the right?!