Butter Cookies - My Childhood Fave

Back in my country, I used to have butter cookies which were sold in a can and came together with other cookies. The taste was so good and buttery of course and it melted in my mouth. Oh..I really wish I could find the same brand of it here. One day I visited a good friend of mine and she showed me a recipe book that got the recipe of butter cookies in it. I took a note of the ingredients and directions and practiced it in my kitchen. I modified half of the recipe with mocha essence. It turn out really good. So now, I can turn to my own kitchen when I feel like having this childhood favorite cookies.

Source: "Pandai Memasak Jilid 10", modified by me
Ingredients:
- 175 g butter
- 125g sugar
- 250g all purpose flour
- 2 egg yolk
- 1/2 tsp vanilla essence
- 1/2 tsp mocha essence (my modification)
- egg yolk+milk for glazing (my modification)

Directions:
Beat butter, sugar and egg yolk with a mixer until smooth. Add flour and mix well. Divide it into 2, and add vanilla essence to one of it and mocha to the other, mix it well. Prepare a cookie sheet by greasing it with margarine. Then using a pipping bag, form the dough as rings, give space in between. Bake at 350F for 20-25minutes. Glaze the top surface with egg yolk and milk. Put it back to the oven and continue to bake for another 5minutes.