Preheat the oven to 350°F.
Line a baking sheet with parchment paper and grease with nonstick spray.
In a mixer, whisk eggs 2 minutes.
Add the sugar, oil, and vanilla.
Add the flour, cocoa powder, baking powder, and salt.
Mix well to combine.
Pour this onto the baking sheet.
Bake for 12 minutes until the cake is set.
Lay out a kitchen towel and sprinkle with cocoa powder.
Once the cake is done, invert it onto the towel, remove the parchment, and lift the towel to roll the cake into a log. The towel will wrap into the cake.
Place in the refrigerator for 1 hour to cool.
Place the cake on the counter and unroll.
Place ice cream scoops all across the top of the cake.
Use an offset spatula to smooth it out.
Tightly roll the cake back up, this time without the towel.
Freeze the cake for at least 3 hours, or overnight.
Serve with powdered sugar and hot fudge.