01 - Preheat oven to 375°F. Line a 12-cup muffin tin with paper liners or grease thoroughly.
02 - In a large bowl, whisk together all-purpose flour, granulated sugar, baking powder, baking soda, and salt until well combined.
03 - In a separate bowl, whisk ricotta cheese, eggs, vegetable oil or melted butter, milk, orange zest, orange juice, and vanilla extract until mixture is smooth.
04 - Pour wet ingredients into dry ingredients. Stir gently with a spatula until just combined; avoid overmixing.
05 - Gently fold in cranberries, ensuring even distribution throughout the batter.
06 - Divide the batter evenly among muffin cups, filling each about three-quarters full. Sprinkle with coarse sugar if desired.
07 - Bake for 18 to 22 minutes, or until muffin tops are golden and a toothpick inserted into the center comes out clean.
08 - Cool muffins in the pan for 5 minutes, then transfer to a wire rack to cool completely.