"Oreshki" Walnut cookies - Печенье "Орешки"

Oreshki- means small walnut shaped cookie. This traditional Russian dessert pieces are always favorite at parties and weddings. They are a combination of crunchy and soft cookies filled with dulce de leche ( cooked condensed milk) and walnuts pieces. You will need a walnut cookie mold "oreshnitsa" to make them. you can find it here :
http://www.amazon.com/Oreshnitsa-International-Company-OIC-120AV-Electric/dp/B0053WJ556/ref=sr_1_1?s=home-garden&ie=UTF8&qid=1347860868&sr=1-1&keywords=Oreshnitsa 
or
http://www.amazon.com/Metal-Mold-Russian-Oreshki-Nutlets/dp/B007Z5NPJQ/ref=sr_1_2?s=home-garden&ie=UTF8&qid=1347860868&sr=1-2&keywords=Oreshnitsa

Ingredients:
1 egg
1/2 cup sugar
1 1/2 stick butter at room temperature
1 cup mayonnaise
1 teaspoon baking soda
3 1/2 cups flour

Directions:

Whisk egg with sugar until pale in color.
Combine flour with butter using your hands to make it into crumbs.
Mix mayo with baking soda and add it to the flour and butter crumbs.
Add the egg and sugar mixture to the crumble and mix it together.

Divide the dough into small balls and bake them using the "Oreshnitsa"

Filling:
1 can dulce de leche
crushed or chopped walnuts

Combine all ingredients.Fill the cookies with filling and take two pieces and stick them together to make one whole oreshka cookie.