Chill the cookie dough for at least 4 hours, preferably overnight, to achieve thick cookies with chewy centers and prevent excessive spreading.

For the best texture, avoid overmixing the flour and do not flatten the dough balls before baking.

For extra chocolate flavor, add 50 g of dark or milk chocolate chips to the dough.

For a white chocolate variation, replace some of the Cadbury Heroes with chopped white chocolate.

Add finely grated orange zest for a chocolate orange variation.

For extra crunch, fold in a handful of chopped hazelnuts, walnuts, or pecans.

For salted caramel cookies, sprinkle a small pinch of flaky sea salt over the cookies immediately after baking.

For mini cookies, make smaller dough balls and begin checking for doneness after approximately 7–9 minutes.

To replace self-raising flour, combine 250 g plain flour with approximately 2 teaspoons baking powder.

Other chopped chocolates, including Cadbury Dairy Milk, Celebrations, or chocolate buttons, can replace Cadbury Heroes. Keep the total chocolate quantity close to 200 g.

Store completely cooled cookies in an airtight container at room temperature for up to 4–5 days or refrigerate for up to 1 week.

Freeze baked cookies in a freezer-safe container with parchment paper between layers for up to 3 months. Thaw at room temperature before serving.

To freeze unbaked dough, shape into balls, freeze on a lined tray until firm, and transfer to a freezer-safe container. Bake directly from frozen, adding approximately 2–4 minutes to the usual baking time.

To reheat, microwave individual cookies for 8–12 seconds or warm in an oven preheated to 150°C (300°F) for approximately 3–5 minutes.

Allow an additional 15 minutes for cooling before serving.