Chocolate Butterscotch-Chip Cookies

2 cups all-purpose flour

1 teaspoon baking soda

1/4 teaspoon salt

1 1/4 cups (2 1/2 sticks) butter, room temperature

1 cup sugar

3/4 cup dark brown sugar

2 large eggs

1 teaspoon pure vanilla extract

1 cup butterscotch chips

1 cup semisweet chocolate chips

. Preheat oven to 350 degrees. Line two baking sheets with parchment paper, and set aside. In a medium bowl, whisk together flour, baking soda, and salt; set aside.

. In the bowl of an electric mixer fitted with the paddle attachment, cream butter and sugars until light and fluffy, about three minutes. Add eggs and vanilla; beat until well combined. Add the flour mixture all at once, and beat until just combined. Stir in chips.

. Drop tablespoons of batter onto prepared baking sheets, two inches apart. Bake until golden brown, about 12 minutes. Transfer to a wire rack to cool on baking sheet, one minute, then transfer cookies to rack to cool slightly. Repeat until all batter has been used.