Sourdough Blueberry Muffins

Details

Ingredients

• 1 cup fresh blueberries
• 2 teaspoons all-purpose flour
• 1 cup all-purpose flour
• 1 teaspoon baking soda
• ½ teaspoon ground cinnamon
• ¼ teaspoon salt
• 1 cup sourdough starter, at room temperature
• ¼ cup white sugar
• 1 egg
• ¼ cup unsalted butter, melted and cooled
• 1 teaspoon vanilla extract
• ½ cup white sugar
• ⅓ cup all-purpose flour
• ¼ cup unsalted butter
• 1 ½ teaspoons ground cinnamon