Mandarin Orange Muffins with Greek Yogurt

Ingredients

• 1 cup icing sugar
• 1 teaspoon baking soda
• 2 tablespoons water
• 1/2 teaspoon salt
• 2 eggs
• pinch salt
• 1 1/4 teaspoons baking powder
• 2 cups all-purpose flour
• 3/4 cup plain greek yogurt
• 1/2 cup granulated sugar
• 2 tablespoons mandarin orange juice
• 6 mandarin oranges
• 2 teaspoons mandarin orange zest
• 3/4 cup milk
• 5 tablespoons unsalted butter