Mix dry ingredients in a bowl, set aside
Mix milk, oil, essence in a separate bowl, set aside
Cream yolks with sugar
Pour milk mixture into yolk mixture
Beat in dry ingredients, a little at a time, until completely combined, set aside
Beat egg whites until frothy
Beat in sugar, a little a time, followed with lime juice and cornstarch
Keep beating until stiff
Fold flour mixture into stiffen egg whites, try not to deflate the egg white much
Take out some batter, colored accordingly
Pipe colored batters onto parchment lined sheet
Bake for 1 minute at preheated 325 mins (per each color)
Pour the rest of the batter covering colored batter, bake for 15-18 mins
Cool cake before spreading filling
Whip cream, flavored with syrup and essence
Fold in chopped bars
Spread filling on cake, roll and let chilled before serving