Blackberry Jam-Filled Muffins

1. Preheat oven to 400°F. Spray a 12-cup muffin pan with non-stick cooking spray.

2. Mix the flour, 2/3 cup sugar, baking powder and salt in a large bowl.

3. Combine the milk, vegetable oil and egg in a medium bowl.

4. Add the milk mixture into the flour mixture, stirring gently until the dry ingredients are moistened.

5. Fill the muffin cups halfway full with batter. Place 1 teaspoon of jam in the center of each muffin. Pour the remaining batter over the jam.

6. Combine the remaining sugar with the cinnamon in a small bowl. Sprinkle the mixture evenly over each muffin. Bake until golden, about 12-15 minutes. Remove pan from oven and set it on a rack. Let muffins cool in the pan for 5 minutes before transferring them to a wire rack. Serve warm.

Recipe adapted from Great American Recipes.