01 - Preheat oven to 375°F. Line a 12-cup muffin tin with paper liners or grease lightly.
02 - In a small bowl, combine granulated sugar, all-purpose flour, and ground cinnamon. Cut in cold, cubed unsalted butter using a fork or fingers until the mixture forms coarse crumbs. Refrigerate until ready to use.
03 - In a large mixing bowl, whisk together all-purpose flour, baking powder, baking soda, salt, granulated sugar, packed light brown sugar, and finely grated orange zest.
04 - In a separate bowl, whisk together large eggs, vegetable oil, whole milk, fresh orange juice, and vanilla extract until well blended.
05 - Pour wet ingredients into the dry mixture. Stir gently until just combined—do not overmix.
06 - Gently fold in fresh or frozen cranberries, halved if large.
07 - Divide batter evenly among muffin cups. Top each muffin generously with the chilled streusel mixture.
08 - Bake in preheated oven for 20 to 22 minutes, or until a toothpick inserted into the center of a muffin comes out clean.
09 - Allow muffins to cool in the pan for 5 minutes, then transfer to a wire rack to cool completely before serving.