Step 1: Preparing the Baking Pan

1. Preheat your oven to 350°F (175°C).
2. Grease a 15×10-inch baking pan to ensure that the cake doesn’t stick.

Step 2: Mixing the Dry Ingredients

3. In a bowl, mix together:

   • Flour
   • Cocoa powder
   • Baking powder
   • Salt

Step 3: Preparing the Wet Ingredients

4. In another bowl, beat the eggs and sugar until the mixture is light and fluffy.
5. Stir in the vegetable oil and vanilla extract.

Step 4: Combining the Mixtures

6. Gradually add the dry ingredients to the egg mixture, mixing until the batter is smooth.

Step 5: Baking the Cake

7. Pour the batter into the prepared pan and spread it evenly.
8. Bake for 12-15 minutes. Allow it to cool completely before proceeding.

Step 6: Preparing the Whipped Cream

9. Whip the heavy cream with powdered sugar until it becomes fluffy.

Step 7: Assembling the Cake

10. Spread the whipped cream evenly across the cooled cake.
11. Carefully roll the cake into a tight log.

Step 8: Decoration

12. Place the rolled cake on a serving platter.
13. Drizzle with chocolate syrup for a beautiful finish.