Get your Italian Nutella HERE!
Preheat oven to 350 degrees F.
In large bowl, with mixer at low speed, beat sugar and margarine or butter until blended.
Increase speed to high; beat until light and fluffy, about 5 minutes. At medium speed, beat in ricotta, Nutella, vanilla, and eggs until well combined.
Reduce speed to low. Add flour, baking powder, and salt; beat until dough forms.
Drop dough by level tablespoons, or with an ice cream scoop about 2 inches apart, onto ungreased large cookie sheet. Bake about 12-15 minutes (cookies will be soft on the inside). With pancake turner, remove cookies to wire rack to cool. Repeat with remaining dough.
When cookies are cool, prepare icing: In small bowl, stir confectioners sugar and milk until smooth. With small metal spatula or knife, spread icing on cookies; sprinkle with sprinkles of your choice. Set cookies aside to allow icing to dry completely, about 1 hour.