Instructions
FOR THE CAKE
Pre-heat oven to 350° (180C). Lightly grease a 10×15 inch (25×38 cm) jelly roll pan or cookie sheet (I used a cookie sheet) line it with parchment paper, make sure it is about 2 inches (4 cm) wider on all sides of the sheet. Then lightly grease and flour the paper. Set aside.
In a medium bowl whisk together the flour, cocoa, baking powder, baking soda and salt. Set aside.
In a large bowl beat eggs until light and fluffy about 3 minutes, continue to beat while slowly adding the sugar, then add the milk and vanilla and beat well for 1 minute.
Add the flour mixture a little at a time and beating on low speed, when all the flour has been added increase the speed to medium and beat for 1 minute.
Spread the batter evenly on the prepared pan, bang the pan a few times to release the air bubbles. Bake for approximately 12-15 minutes, do not over bake. Check for doneness by lightly touching the cake in the middle with the tip of your finger if it springs back it’s done. Immediately remove the baked cake with the parchment paper from the cookie sheet and roll up with the paper still attached to the cake. Place it on a wire rack to cool.
Unroll the cake, removing the parchment paper as you unroll, then spread it with a little more than ½ of the buttercream, roll