Preheat oven at 160°C/320°F.

Separate the eggs in 2 large bowls.

In the yolk bowl, add sugar. Mix vigorously until creamy and pale.

Add in the oil, milk, vanilla and salt. Mix vigorously until well combined.

Sift in the flour batches. Whisk gently until combined, do not over mix. Set aside.

In the egg white bowl, add the cream of tartar. With an electric mixer, mix on low for few seconds until foamy. Add in the sugar in 3 batches. Continue mixing on high while adding the sugar until stiff peaks formed.

Fold the egg whites into the yolk batter in 3 batches. Fold in gently in a circular motion until the white disappear. Add another batch and continue folding in with the whisk. Towards the end, switch to a spatula to scrape the bowl to unsure even mixing.

Transfer batter into a 33x33cm flat pan, greased and lined with parchment paper. Use a spatula to spread the batter evenly. Tap the pan few times on the table.

Bake in preheated oven at 160°C/320°F for 25-30 min or until inserted skewer comes out clean.

Let the cake cool completely before slicing.

Once cool, measure and cut 4 equal horizontal sheets. At the end of the last sheet, trim off the edge 45° angle (for sealing purpose)

In a small bowl, add the chocolate melts and whipping cream. Microwave a few seconds until the chocolate in melting stage. Mix until smooth and well combined. Set aside.

In a small bowl, add coffee and hot water. Mix until well dissolved. Set aside.

In a large bowl, add the softened butter. Mix until creamy.

Sift in the powdered sugar. Mix until well combined.

Add in the coffee and chocolate mixture. Mix until well combined.

In another bowl, add the cream cheese. Use a spatula to mash and make sure it is softened.

Add the cream cheese into the mixture (butter coffee and chocolate). Mix until well combined. Make sure there is no lumps.

Brush the coffee syrup on the cake sheets.

Spread the frosting with a spatula. Spread evenly.

Gently roll up each horizontal pieces, connecting to each other. Roll until the 2nd piece. You’ll probably find it hard to continue as the roll is getting bigger.

Place the rolled cake on the cake plate. Continue rolling with the other 2 sheets.

Seal the end with frosting. Fasten it with a plastic sheet. Refrigerate the cake for about 30 minutes so that the cake is tight and stable.

Frost around the cake.

Use a pointed tool (I’m using a pointed chopstick) to draw log grain lines.

Use some almond flakes to decorate as the log fungus.

Decorate the top with rosemary leaves.

Dust the cake with powdered sugar.

Refrigerate the cake before cutting.

Cake is ready to serve.