Blueberry-Orange Mini Muffins | Williams Sonoma

Ingredients

• 6 tablespoons unsalted butter, cut into chunks
• 1 1/2 cups all-purpose flour
• 1/3 cup plus 2 tablespoons sugar
• 2 1/4 teaspoons baking powder
• 1/4 teaspoon salt
• 2/3 cup milk
• 1 egg, at room temperature
• 1 teaspoon finely grated orange zest
• 1/2 teaspoon vanilla extract
• 2/3 cup fresh blueberries