In a bowl pour in your butter add sugar and mix for like 5min,add your egg and mix don't over mix it

Then add milk,powdered vanilla and 1 cup of flour mix keep on adding cup by cup

Make a soft dough divide into pieces and add food color on each and mix

Get your rolling pin and leather and roll the dough flat cut each side to give you square shape arrange them one after d other

Cut them and arrange on baking try sprinkle some color sugar

Pre heat the oven for about 5min @180° bake for 15-20min