Soft chocolate chip cookies

Ingredients

• 2 cups butter, room temperature
• 2 1/2 cups brown sugar
• 1 cup white sugar
• 1 tablespoon vanilla
• 4 eggs
• 1/4 cup sour cream
• 1 teaspoon salt
• 1 teaspoon baking soda
• 1 teaspoon baking powder
• 5 1/2 cups flour
• 4 cups (2 bags) chocolate chips