Preheat the oven to 170.C. Line a baking sheet with parchment paper. This is optional.

In a bowl, mix butter, icing sugar and vanilla till well mixed.

Add the pecans and the flour. Mix till you get a nice dough.

Take about 1/2 tablespoon of dough and roll into balls between your palms. Place 1-inch apart on the baking sheet.

Bake for about 20 minutes or until the tops are set and the bottoms are golden brown.

Let the cookies cool on the pans for 5 minutes.

In a medium bowl, place about 1/2 cup of icing sugar and roll the warm cookies in the sugar.

Let it cook completely and store in an airtight container.