Bánh Bông Lan Cuốn (Swiss Roll)

To make this treat... follow the recipe for spongefon cake, using the jelly roll method (bottom of recipe).

To get the decorative strips on the cake: after making the cake batter, remove about 3 tbs of batter and mix in some food coloring. Pour the rest of the batter into a jelly roll pan. Fill a sandwich bag with the colored batter and cut a small hole in the bag. Pipe the colored batter into long strips on top of the batter already in the ban. Use a knife or toothpick to "drag" the lines together to create the pattern (if the colored batter is piped on horizontally then drag the toothpick vertically). Bake and fill/assemble as you would for any jelly roll.