3 egg yolk
3 TB icing sugar
100gm butter, softened
1 TB corn oil (cooking oil)
1/4 tspn salt
1 lemon zest & 1 lime zest
(1) cream egg yolk, butter, cooking oil & sugar till well mixed.
(2) stir in the remaining ingredients till well combined.
(3) insert mixture to pipping bag and then pipe mixture to lined baking tray.
(4) finally, bake at preheated oven 150-160'C for 15 mins or till brown.