Granulated Sugar (Best Option)
1 teaspoon granulated sugar per 1 teaspoon powdered sugarGranulated sugar works because it provides the same level of sweetness as powdered sugar, which is important for balancing the savory flavors in meatballs. Although it lacks the fine texture of powdered sugar, the cooking process allows it to dissolve sufficiently.
To ensure even distribution, mix granulated sugar thoroughly with other ingredients before forming meatballs. Watch for any slight grittiness, but this is usually minimal after cooking.
Compared to powdered sugar, granulated sugar may slightly alter the mouthfeel but will not negatively impact the final flavor or texture significantly, making it the best practical substitute.