Preheat the oven to 350 degree Fahrenheit .

Prepare a sheet pan with a silpat or parchment paper.

In the bowl of a mixer, cream together the butter and sugar.

Add the vanilla and eggs, orange zest and beat until everything get blend well.

In a separate bowl combine the flour, salt and baking powder.

Add the dry ingredients to the butter-sugar-egg mixture.

Turn the dough out onto a lightly floured surface and knead by hand a few minutes until you have smooth dough.

Chill the dough for about 30 minutes in refrigerator.

Break off pieces (about a rounded tablespoon)

Roll it into a thin rope of about 8 inch long.

Bring the two ends together like this.

Twist the two ends together

Place it on the sheet pan lined with parchment paper.

When you have shaped all of the cookies, then beat the egg wash and lightly brush the tops of the cookies.

Bake the cookies until golden brown, about 20-22 minutes.

Let them cool on a rack for 10 minutes. And store it in airtight container.