01 - Preheat the oven to 375°F. Line two baking sheets with parchment paper.
02 - In a large bowl, whisk together the flour, sugar, baking powder, baking soda, and salt.
03 - In a separate bowl, whisk melted butter, eggs, milk, orange juice, orange zest, and vanilla extract until fully incorporated.
04 - Pour the wet ingredients into the dry ingredients and gently mix until just combined, avoiding overmixing.
05 - Fold the halved cranberries evenly into the batter.
06 - Using a large cookie scoop or 1/4 cup measure, drop generous mounds of batter onto prepared baking sheets, spacing about 2 inches apart.
07 - Sprinkle the batter tops with coarse sugar if desired.
08 - Bake for 13 to 15 minutes, or until edges turn golden brown and the centers are set.
09 - Allow muffin tops to cool on the baking sheets for 5 minutes before transferring to a wire rack to cool completely.