01 - Preheat oven to 375°F. Line a 12-cup muffin pan with paper liners or grease lightly.
02 - Whisk together flour, sugar, baking powder, baking soda, and salt in a large bowl.
03 - In a separate bowl, whisk eggs, vegetable oil, whole milk, orange juice, orange zest, and vanilla extract until fully blended.
04 - Pour wet mixture into dry ingredients and gently fold until just combined, avoiding overmixing.
05 - Fold in cranberries and nuts if using, ensuring even distribution.
06 - Spoon batter evenly into muffin cups filling about three-quarters full; sprinkle coarse sugar on top if desired.
07 - Bake for 18 to 22 minutes until a toothpick inserted in the center comes out clean.
08 - Allow muffins to cool in the pan for 5 minutes before transferring to a wire rack to cool completely.