Preheat oven to 425°F. Line 8 jumbo muffin cups with parchment or paper liners, or spray with cooking spray.
In a medium bowl, whisk together flour, baking powder, and salt. In the bowl of a stand mixer fitted with the whisk attachment, beat granulated sugar, sour cream, eggs, and orange juice at medium speed until well combined, 3 to 4 minutes, stopping to scrape sides of bowl. Reduce mixer speed to low, and gradually add flour mixture. Continue beating at low speed, and add oil in a slow, steady stream until combined. Fold in strawberries.
Spoon batter into prepared muffin cups. Top each muffin with 1 tablespoon Balsamic Reduction, and use a wooden pick to swirl. Sprinkle with turbinado sugar.
Bake for 5 minutes. Reduce oven temperature to 350°F, and continue baking until muffins are golden brown and a wooden pick inserted in center comes out clean, 25 to 30 minutes. Let cool in pans for 5 minutes. Serve warm or at room temperature.
Recipe by Bake from Scratch at https://bakefromscratch.com/strawberry-balsamic-muffins/