Potato Doughnut Holes | RICARDO

Ingredients

• 3/4 cup (180 ml) milk
• 1 tablespoon (15 ml) white vinegar
• 2 1/2 cups (625 ml) unbleached all-purpose flour
• 2 teaspoons (10 ml) baking powder
• 1/2 teaspoon (2.5 ml) baking soda
• 1/4 teaspoon (1 ml) salt
• 1/4 cup (60 ml) unsalted butter, softened
• 1 cup (250 ml) brown sugar
• 1/2 cup (125 ml) plain mashed potatoes, cold
• 2 eggs
• Oil, for frying
• Granulated sugar, for coating (optional)