Preheat your oven to 375°F (190°C) and 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 until well combined.
In another bowl, mix the melted butter, buttermilk, eggs, and vanilla extract until smooth.
Pour the wet ingredients into the dry ingredients and stir gently until just combined. Be careful not to overmix; a few lumps are okay.
Fold in the cherries and ground cinnamon until evenly distributed.
Divide the batter evenly among the muffin cups, filling each about 2/3 full.
Sprinkle the coarse sugar on top of each muffin for added sweetness and crunch.
Bake in the preheated oven for 20-25 minutes, or until a toothpick inserted into the center comes out clean.
Allow the muffins to cool in the pan for 5 minutes, then transfer them to a wire rack to cool completely.