Butter cookies....The best ever!

Oh...these cookies!How can I ever give a description?Maybe I should say t'was "love at first bite!"

The crispy outside gives way to the utterly crumbly,buttery,melt in your mouth goodness within....And before you even know...they're gone!And believe me,you CANNOT stop at 1 or 2 or 3....you simply have to gorge on a whole batch at one go and it will be too late when you realise that you've almost devoured a whole slab of butter!What a grave sin....And you're not even sorry!!
So pull yourselves up ladies.Make them and your husbands will want to marry you again and your children will never want to get married and leave you....Okay...I went too far here;Just make them and you'll never regret!

BUTTER COOKIES(makes about 50 bite sized cookies)

1 c Salted butter(good quality,softened)
3/4 c sugar(fine,granulated)
1 large egg(separated)
2 c All purpose flour
11/2 tsp flavoring (I prefer vanilla)

Method
Preheat oven to 350 f/180 c.
Beat butter and sugar until well combined.
Add egg yolk and vanilla and beat again.
Add flour(in three batches)and beat until just combined.
Scoop out teaspoons of the dough and roll into balls.
Place them on a cookie sheet(a few cms apart).
Bake them for 16 minutes.Each oven is different.So keep watch.The cookies are best when the bottom just starts to brown.
When done,take them out and keep them on the baking sheet for 5 minutes before you carefully transfer them with a spatula onto a cooling rack.
Wait for cookies to cool completely else they wont be crisp.
Enjoy!

For a variation,after you roll them,make a small dent on the top with your finger.Drop a little of your favorite jam into the dent and bake till done!