Preheat the oven – Set your oven to 350°F (175°C). This ensures it’s hot and ready when the cookies go in. Line a large baking tray with parchment paper so the cookies don’t stick.
Melt the butter – Place ½ cup unsalted butter in a saucepan over low heat. Stir gently until it melts completely. Keep the heat low to prevent burning.
Add the sugar – Pour in 1 cup granulated sugar. Stir constantly until the sugar dissolves into the melted butter. The mixture should look smooth and glossy. If you’re using brown sugar, expect a slightly thicker, caramel-like texture.
Optional flavoring – At this stage, you can stir in 1 teaspoon vanilla extract for added aroma and taste.
Fold in the cornflakes – Remove the saucepan from heat. Add 4 cups of cornflakes to the butter-sugar mixture. Gently fold them in using a spatula or large spoon. Stir carefully so you coat all the flakes without crushing them too much.
Optional add-ins – If you’d like to make the cookies more exciting, now is the time to stir in extras like chopped nuts or chocolate chips. If you plan to drizzle melted chocolate on top, save that for after baking.
Shape the cookies – Using a spoon, drop small mounds of the mixture (about 1–2 tablespoons each) onto the prepared baking tray. Leave a little space between each one because they may spread slightly.
Bake – Place the tray in the oven and bake for 8–10 minutes, or until the edges of the cookies turn golden brown. Be careful not to overbake, as the sugar can burn quickly.
Cool completely – Remove the tray from the oven and let the cookies sit for about 5 minutes before transferring them to a wire rack. They will harden as they cool, giving them that perfect crunch.
Optional topping – Once cooled, you can drizzle with melted chocolate or dust lightly with powdered sugar for a bakery-style finish.