Preheat oven to 350°F (175°C) and line baking sheets with parchment paper.
In a large bowl, cream together butter, granulated sugar, and brown sugar until light and fluffy.
Beat in eggs, one at a time, then add vanilla extract.
In a separate bowl, whisk together flour, baking soda, and salt. Gradually add dry ingredients to the wet mixture.
Stir in chocolate chips and Rice Krispies cereal until evenly combined.
Scoop dough onto prepared baking sheets, about 2 tablespoons per cookie, spacing 2 inches apart.
Bake for 10–12 minutes, or until edges are lightly golden. The centers may look slightly undercooked but will set as they cool.
Let cookies cool on the baking sheet for 5 minutes before transferring to a wire rack.