Preheat the oven to 375°F (190°C). Line a muffin tin with paper liners or grease it with cooking spray.
In a large bowl, whisk together the flour, granulated sugar, baking powder, baking soda, and salt.
In another bowl, combine the melted butter, buttermilk, eggs, and vanilla extract. Mix until well combined.
Pour the wet ingredients into the dry ingredients and stir until just combined. Do not overmix; a few lumps are okay.
Gently fold in the cherries and ground cinnamon.
Divide the batter evenly among the muffin cups, filling each about 2/3 full.
In a small bowl, mix the brown sugar with a pinch of cinnamon. Sprinkle this mixture over the tops of the muffins.
Bake for 18-20 minutes or until a toothpick inserted into the center comes out clean.
Allow the muffins to cool in the pan for 5 minutes before transferring them to a wire rack to cool completely.