01 - Preheat the oven to 350°F and line a 12-cup muffin tin with paper liners or grease lightly with cooking spray.
02 - Cook the bacon in a skillet over medium heat until crisp, about 6-8 minutes. Drain on paper towels, then chop into small pieces.
03 - In a large bowl, whisk together the flour, sugar, baking powder, baking soda, and salt until well combined.
04 - In a separate bowl, whisk together the milk, eggs, maple syrup, melted butter, and vanilla extract until smooth.
05 - Pour the wet ingredients into the dry ingredients and stir gently with a spatula until just combined. Do not overmix—a few lumps are fine.
06 - Gently fold in most of the chopped bacon, reserving about 2 tablespoons for sprinkling on tops.
07 - Divide the batter evenly among the 12 muffin cups, filling each about three-quarters full. Sprinkle the reserved bacon on top of each muffin.
08 - Bake for 18-20 minutes, or until a toothpick inserted into the center of a muffin comes out clean.
09 - Let the muffins cool in the pan for 5 minutes, then transfer to a wire rack. Drizzle with additional maple syrup before serving warm.