Blueberry Oatmeal Muffins

Name: Blueberry Oatmeal Muffins
Prep time: 20 min
Cook time: 22 min
Total time: 42 min
Cuisine: American
Ingredients: 1 cup plus 1 tablespoon old-fashioned rolled oats, divided; 1 cup dairy or non-dairy milk; Cooking spray or 12 paper muffin liners; 1 1/2 cups all-purpose flour; 1/2 cup packed light or dark brown sugar; 1 teaspoon ground cinnamon; 1 teaspoon baking powder; 1/2 teaspoon baking soda; 8 tablespoons (1 stick) unsalted butter, or 1/2 cup vegetable or canola oil; 1 large egg; 1 tablespoon vanilla extract; 3/4 teaspoon kosher salt; 1 1/2 cups fresh or frozen blueberries (about 7 ounces, do not thaw)