Grandma past 3 years ago this month so I thought this would be a good time to share her recipe since my best memories are helping her in the kitchen.
Ingredients:
1 cup all purpose flour
1 stick of butter soften
1 pinch of salt
1 tsp of sugar
1 tsp of baking powder
Directions:
Mix all ingredient until dough forms.
Let sit for at least half hour.
After it has sat form the balls. They do not have to be perfectly round. The less you mess with the dough the better they cook. 
Preheat oven to 350
Cook for 30 min or until the bottom are golden brown. I would check them after 20 min since ovens vary.
Once out the oven roll in the sugar and cinnamon mix or in powder sugar.
I say about a cup of sugar and 2 Tbs of cinnamon. But you can always add more cinnamon or less up to your taste.
Let cool and enjoy!
*this makes 12 or so polvorones depending how big you make them and how long you let the dough rise. Can always double recipe for more.
Enjoy !!