Sure! Do you think I'd be able to improvise & add some cinnamon? Are they a christmas cookie in Spanish speaking countries or are they for any time of the year?
I checked out Ebay & Lidl for them - but had no luck - so I'm keen for recipes! 
You can always add cinnamon to anything

Since 1959, Christmas was not celebrated in Cuba. It was illegal at first and then the tradition just died off. It's only in recent years that the government has publicly allowed and enouraged people to celebrate Christmas, specially Christmas Eve which seems to be the day most Hispanic people actually celebrate. So, polvorones are not specifically Christmas cookies. I remember we were given them during "merienda" (snack time between getting there and lunch and then between lunch and going home). Some kids used to dunken them in water but that was just gross, I prefered milk

Here's the recipe:
Polvorones (Spanish Shorbread)makes about 6 dozen
-16 tablespoons (2 sticks) plus about 2 teaspoons unsalted butter, softened
- 1/2 cup confectioners' sugar plus more for rolling
- 2 1/2 cups flour (sift before measuring)
- 1/4 teaspoon salt
- 1 teaspoon vanilla extract
1. Cream the 2 sticks of butter with the sugar until is is lemon-colored.
2. Beat in the flour, salt, and vanilla, making a stiff dough.
3. Refrigerate until well chilled.
4. Preheat the oven to 400 degrees F. Grease a cookie sheet with the remaining butter.
5. Roll the dough into balls about 1 inch in diameter. Place them on the cookie sheet and press them down a bit with the back of a spoon.
6. Bake them for about 14 minutes, until lightly golden.
7. As soon as you remove them from the oven, roll the polvorones in confectioners' sugar and set them on a wire rack. When they are cool, roll them in sugar again.
8. Serve at room temperature.
Enjoy!