Using ingredient cooking oil for deep-fat frying additional sugar

Drop Doughnuts

• 6 at a time
• 1 egg (beaten)
• 1 cooking oil for deep-fat frying additional sugar
• 190 gr all purpose flour
• 120 ml sour cream
• 110 gr mashed potatoes
• 50 gr sugar
• 2 gr vanilla extract
• 2 gr baking soda
• 1 gr baking powder