Preheat your oven to 350°F (175°C). Grease your baking pan lightly with butter or oil. This prevents sticking and helps easy serving.

In a bowl, mix chocolate cake mix, one egg and melted butter. Stir well until thick dough forms. It should feel soft and slightly sticky.

Press the dough evenly into the baking pan. Use your hands or spatula. Make sure the layer is smooth and covers the whole bottom.

In another bowl, beat softened cream cheese until smooth. Add two eggs and vanilla extract. Mix until creamy and lump-free.

Slowly add powdered sugar and cocoa powder. Mix gently until smooth batter forms. It should be thick but pourable.

Pour melted butter into the mixture. Mix well until everything combines perfectly. The filling should look glossy and rich.

Pour the cream cheese mixture over the cake base. Spread evenly using a spatula. Make sure all corners are covered properly.

Place the pan in the oven. Bake for about 40–45 minutes. The edges should be set, but center should stay soft and gooey.

Remove cake from oven and let it cool completely. This helps the layers set. Cutting too early may make it messy.

Cut into squares and serve. Enjoy the rich, chocolatey, gooey texture. It tastes even better slightly warm.