Preheat the oven to 350F.
In a large bowl, beat the butter and sugars until pale and fluffy. Beat in the eggs and vanilla. In a small bowl, stir together the flour, baking soda and salt. Add to the butter mixture and beat on low speed until combined. Stir in the chocolate chips.
Drop the dough in large spoonfuls, spacing them about 2 inches apart to give them room to spread, on a parchment-lined baking sheet. Bake for 10 minutes or until deep golden, then cool the cookies on a wire rack. Makes about 1 1/2 dozen cookies.