Best Blueberry Muffins with Orange Glaze | America's Test Kitchen

Ingredients

• 2 cups fresh blueberries (about 10 ounces/283 grams), picked over
• 1 1/8 cups sugar (8 ounces/227 grams) plus 1 teaspoon
• 2 1/2 cups unbleached all-purpose flour (12 1/2 ounces/354 grams)
• 2 1/2 teaspoons baking powder
• 1 teaspoon table salt
• 2 teaspoons finely grated orange zest
• 2 large eggs
• 4 tablespoons unsalted butter , melted and cooled slightly (1/2 stick)
• 1/4 cup vegetable oil
• 1 cup buttermilk (see note)
• 1 1/2 teaspoons vanilla extract
• 4 teaspoons turbinado sugar
• 1 cup confectioners' sugar
• 1 1/2 tablespoons orange juice