In a bowl add butter and sugar. Mix it well with a hand mixer until creamy.

Then add egg and vanilla. Mix it. Gradually add flour and mix. Until dough is formed.

Take half of the dough and add coco powder to it mix well.

Then after 30 mins take out both doughs and flat them using rolling pin for about 1/2 inch thick then cut them into strips. Then attach one vanilla and one choco strip with eachother using water

Again attach two more strips with it.It will make 4 strips (2 strips of vanilla and 2 strips of chocolate). Them refridgerate these log. By covering them in cling wrap for about 30 mins.

Unwrap the logs and trim the ends and cut biscuits of 1/2 inch thickness using sharp knife and bake all the cookies in preheated oven 180 degree

For about 10 - 12 mins or until cookies are golden and crisp...😊😊😀😀

Then wrap both vanilla and choco dough in cling wrap and chill it in fridge for 30 mins.

After 30 mins unwrap the dough and roll it with a rolling pin.

Roll the coco dough in the same way. Both dough should be 1/2 inch thick. Now cut into equal size strips.

Then take one vanilla and choco strip and attach them with each other using water.