Preheat oven to 350F and line baking sheet(s) with parchment paper.
Cream together the butter and sugars, using a hand mixer if available.
½ cup butter, ½ cup sugar, ½ cup brown sugar
Add egg and vanilla, mix well.
1 egg, 1 teaspoon vanilla
In a separate bowl, mix the flour, baking soda, and oats. Then add to the mixing bowl and stir well to combine.
1 cup flour, 1 cup oats, ½ teaspoon baking soda
Add the cereal and chocolate chips and stir until evenly distributed.
1 cup Rice Krispies cereal, 1 cup semi-sweet chocolate chips
Use a cookie scoop to measure the batter and place about 2 inches apart on the prepared baking sheet. Use your hands to gently flatten each portion of dough into a round shape.
Bake for 10 minutes in the preheated oven. Allow cookies to cool 1 to 2 minutes on the baking sheet before removing to a wire rack to cool completely.