Absolutely Sinful Chocolate Chip Cookies

My friend Anne found this generationally OLD recipe off the net and made it for her brothers. This one's staying around.

• Ready In: 23 mins
• Yields: 2 batches

Ingredients

• 2 (1 1/4ounce)  unsweetened chocolate squares
• 1⁄2 cup butter
• 2  cups all-purpose flour
• 1⁄2 teaspoon baking soda
• 1  teaspoon baking powder
• 1⁄4 teaspoon salt
• 1 1⁄4 cups white sugar
• 2  large eggs
• 1  teaspoon vanilla extract
• 2⁄3 cup sour cream
• 2  cups  semi-sweet chocolate chips

Directions

1. Preheat oven to 375°F (190°C).
2. In the microwave or over a double-boiler, melt unsweetened chocolate and butter together, stirring occasionally until smooth.
3. Sift together flour, baking soda, baking powder and salt; set aside.
4. In a medium bowl, beat sugar, eggs, and vanilla until light.
5. Mix in the chocolate mixture until well blended.
6. Stir in the sifted ingredients alternately with sour cream, then mix in chocolate chips.
7. Drop by rounded tablespoonfuls onto ungreased cookie sheets.
8. Bake for 8-10 minutes.
9. Allow cookies to cool on baking sheet for 5 minutes before transferring to a wire rack to cool completely. Store in an airtight container.