In the bowl of a stand mixer with the paddle attachment, on medium speed, cream the softened butter with the granulated sugar and brown sugar until light and fluffy, about 3 minutes.
1 cup Unsalted Butter, 1 cup Granulated Sugar, 1 cup Light Brown Sugar
Add the eggs and vanilla extract, let mix until just combined. Scrape down the sides of the bowl as needed.
2 large Eggs, 1 teaspoon Vanilla Extract
Whisk together the flour, baking soda, baking powder and salt and add to the mixing bowl. Mix on low speed just until combined.
2 cups All-Purpose Flour, 2 teaspoons Baking Soda, ½ teaspoon Baking Powder, 1 teaspoon Kosher Salt
Add the oatmeal to the mixing bowl and mix on low speed just until combined.
2 cups Quick Cooking Oats
Fold in the corn flakes, rice cereal, shredded coconut and chopped nuts by hand with a strong spatula or wooden spoon.
1 cup Corn Flakes, 1 cup Crispy Rice Cereal, 1 cup Unsweetened Coconut Flakes, 1 cup Chopped Nuts
Scoop onto a parchment lined cookie sheet using a 1-ounce cookie scoop.
Bake at 350℉ for 9-12 minutes. The cookies will be golden brown around the edges and set in the center.
Let cool on the baking sheet for a few minutes before transferring them to a wire rack to let cool completely.
Best eaten the day they are baked.
Notes
The “Scoop and Sweep” Method
Measure the flour using the 'scoop and sweep' method, where you scoop the flour into the measuring cup and then level it off using the flat edge of a knife.