Cornflake cookies are thick and buttery cookies filled with old fashioned oats and cornflakes. These cookies with corn flakes have crisp edges and chewy centers.
In a large mixing bowl, whisk in the cooled melted butter with the light brown and granulated sugars until well combined. Whisk in the egg, egg yolk, vanilla extract until smooth and well combined.
Using a medium cookie scoop (2 tablespoons, 30 ml), scoop the oatmeal cornflake cookie dough and place the cookie dough balls onto the lined baking sheet about 2 inches apart.
Bake at 350 F (177 C) for 10 -12 minutes or until the edges of the cookies are set and the centers are slightly puffed.Cool the buttery cookies on the baking sheet for 3 - 4 minutes.