Perfect Blueberry Muffins

Name: Perfect Blueberry Muffins
Cuisine: American
Ingredients: 5 tablespoons (70 grams) unsalted butter, cold is fine; 1/2 cup (3 1/2 ounces or 100 grams) sugar; Finely grated zest from 1/2 a lemon (previously: 1/2 teaspoon zest); 3/4 cup plain unsweetened yogurt or sour cream; 1 large egg; 1 1/2 teaspoons (7 grams) baking powder; 1/4 teaspoon baking soda; 1/4 teaspoon fine sea or table salt; 1 1/2 cups (195 grams) all-purpose flour; 1 1/4 to 1 1/2 cups (215 to 255 grams) blueberries, fresh or frozen (no need to defrost) (previously: 3/4 cup, see note up top); 3 tablespoons turbinado (sugar in the raw) sugar