The cookie base is soft and fudgy—think of it as a dense, cake-like cookie that holds the ganache perfectly.

1.Melt chocolate and butter: Fill a small saucepan with 2–3cm of water and bring it to a gentle simmer (this is the double-boiler method). Place the chopped dark chocolate and cubed butter in a heatproof bowl, then set the bowl over the saucepan (make sure the bowl’s bottom doesn’t touch the water). Stir gently with a silicone spatula until both are fully melted and the mixture is smooth (about 3–4 minutes). Remove the bowl from the heat and let it cool for 5 minutes—you don’t want hot chocolate to cook the eggs.

2.Mix in sugar and eggs: Add the granulated sugar to the cooled chocolate-butter mixture and stir until fully combined. Then, pour in the beaten eggs gradually, stirring well after each addition. This ensures the eggs blend smoothly and the batter doesn’t curdle. Keep stirring until the mixture is glossy and uniform.

3.Add dry ingredients: Sift the cocoa powder and cake flour directly into the chocolate-egg mixture. Use a spatula to fold the dry ingredients into the wet ones—stir gently until there are no visible lumps. Don’t overmix! Overmixing can make the cookie base tough instead of soft.

4.Bake the cookie sheet: Pour the smooth batter into the lined square baking pan and spread it evenly with a spatula (the batter should be about 1cm thick). Preheat your oven to 180°C (356°F), then bake the batter for 8 minutes. Important: Don’t overbake! The cookie sheet should still be slightly soft in the center—it will firm up as it cools.

5.Cut into rounds: Let the baked cookie sheet cool completely in the pan (about 15 minutes). Once cool, use the round cookie cutter to punch out 16–20 circles (you’ll need two circles per cookie). Gather any leftover cookie scraps (you can eat them as a snack or re-roll them gently to cut more circles, though they may be a little less soft).

This ganache is creamy, rich, and the perfect glue for the cookie layers—plus, it adds that extra chocolatey kick.

1.Prepare the double-boiler: Fill a small saucepan with 2–3cm of water and heat it over low heat until it simmers (do not let the water boil).

2.Melt chocolate with heavy cream: Place the chopped dark chocolate in a heatproof bowl, then pour the 60g heavy cream over the chocolate. Set the bowl over the simmering water (ensure the bowl’s bottom doesn’t touch the water) and let it sit for 1 minute—this softens the chocolate.

3.Stir to make smooth ganache: Use a silicone spatula to gently stir the chocolate and heavy cream together, moving in slow circles. Keep stirring until all the chocolate is fully melted and the mixture becomes smooth, velvety, and free of lumps (this takes about 2–3 minutes).

4.Cool the ganache: Remove the bowl from the double-boiler and set it aside at room temperature to cool for 10 minutes. The ganache should thicken slightly but still be spreadable—if it’s too runny, it will ooze out of the cookie sandwiches; if it’s too thick, warm it over the double-boiler for 10 seconds to loosen.

Now comes the fun part—putting it all together and getting that signature “dirty” cocoa coating!

1.Sandwich with ganache: Take one cookie circle and spread a generous tablespoon of cooled ganache over its surface (leave a small border around the edge so the ganache doesn’t ooze out too much). Place another cookie circle on top to make a sandwich. Press down gently to seal the two layers together. Repeat this with all the cookie circles—you’ll have 8–10 sandwich cookies.

2.Coat with cocoa powder: Pour the extra cocoa powder into a shallow dish. Hold a cookie sandwich by its edge, then dip and roll it in the cocoa powder—make sure the entire outer surface (including the sides) is covered in cocoa. Don’t worry if some cocoa sticks unevenly—that’s the “dirty” look we want! Tap off any excess cocoa powder over the dish to avoid waste.

These Chocolate Dirty Soft Cookies are best eaten fresh, but they’ll stay soft and delicious for up to 2 days if stored in an airtight container at room temperature (keep them away from heat, or the ganache may melt).

Serve them with a glass of cold milk or a cup of coffee—each bite is a mix of soft cookie and creamy ganache, with a dusty cocoa finish that’s pure chocolate heaven.