Preheat oven to 350ºF.
Get out and measure your ingredients.
In a large mixing bowl, cream butter and vanilla together.
Add powdered sugar and beat again.
Add flour and salt.
Beat until smooth dough forms.
Roll dough into 1-inch balls and place them on a greased cookie sheet.
Slightly flatten each ball of dough. I usually use a glass with a flat bottom to do this.
Using a teaspoon measuring spoon press into the center of each cookie.
Create a small divot in the center of each cookie.
Using a spoon, fill the divot with dulce de leche. Do not overfill.
Fill each cookie.
Bake cookies for 11-13 minutes
or until bottoms are slightly browned.
Dulce de Leche is melted flat. Rest cookies on pan for 5 minutes.
Remove from pan and serve.
Enjoy!
Every bite!