Combine the powdered sugar and orange juice in a bowl and whisk together. Set aside.
Preheat the oven to 375 degrees. Line a large baking sheet with parchment paper.
In medium-sized bowl, combine the flour, baking powder, and salt. Whisk until these ingredients are combined. Set aside.
In another medium-sized bowl, combine the butter and sugar. Beat until light and fluffy, about 3-4 minutes. Add the eggs, 1 at a time until well mixed. Add the ricotta, orange juice, and orange zest. Beat to mix.
Stir in the dry ingredients into the butter-sugar mixture and mix well. Spoon the dough (about 1 tablespoon per cookie) onto the cookie sheet. Bake for about 12-14 minutes or until the edges are slightly golden. Remove from the oven and cool completely.
Spoon about ½ teaspoon of the glaze onto each cookie and allow the glaze to harden, about 5-10 minutes.