Step 1: Preheat your oven to 375°F (190°C). Line baking sheets with parchment paper or use silicone baking mats.
Step 2: In a large bowl, using an electric mixer, cream together the softened butter, granulated sugar, and packed light brown sugar until the mixture is light and fluffy, usually 2-3 minutes.
Step 3: Beat in the eggs one at a time, ensuring each egg is fully incorporated before adding the next. Stir in the vanilla extract until combined.
Step 4: In a separate medium bowl, whisk together the all-purpose flour, baking soda, and salt until well combined.
Step 5: Gradually add the dry ingredients to the wet ingredients, mixing on low speed until the flour is just incorporated. Be careful not to overmix the dough.
Step 6: Gently fold in the semi-sweet chocolate chips and Rice Krispies cereal until they are evenly distributed throughout the cookie dough.
Step 7: Drop rounded tablespoons of cookie dough onto the prepared baking sheets, leaving about 2 inches between each cookie for spreading.
Step 8: Bake for 10-12 minutes, or until the edges of the cookies are golden brown and the centers still look slightly soft. Avoid overbaking to maintain a chewy texture.
Step 9: Remove the baking sheets from the oven and let the cookies cool on the sheets for 5 minutes before transferring them to a wire rack to cool completely. Enjoy!