Polvorones orange

This recipe produced an rich orange. To enjoy. 
Ingredients 

1 orange. 
2 cups flour. 
150 grams of butter. 
1 tablespoon baking. 
1 / 3 cup sugar. 
1 egg yolk. 
Sugar glass. 
In preparation 

The butter was an added grated orange. Then the sugar is Polvorones orange
incorporated and stirred, then you pour the egg yolk, orange juice and sifted flour and baking soda.