In a separate bowl, cream together the softened butter and sugar until light and fluffy. Beat in the eggs one at a time, then stir in the vanilla extract.
¾ cup granulated sugar, ½ cup butter, 2 whole eggs, 2 teaspoon vanilla
Add the calamansi juice, sour cream and whole milk.
¼ cup whole milk, ¼ cup calamansi juice, ¼ cup sour cream
Add the dry ingredients and the wet ingredients . Mix until just combined, being careful not to overmix.
Fill the prepared muffin cups ¾ full with batter.
Bake for 5 minutes at 400°F (205°C). This initial high heat helps the muffins rise quickly for that perfect peak.
After 5 minutes, reduce the oven temperature to 350°F (175°C) and continue baking for 15-20 minutes, or until a toothpick inserted into the center comes out clean.
While the muffins cool, prepare the glaze by whisking together the powdered sugar and calamansi juice until smooth. Adjust the amount of calamansi juice for your desired consistency – thicker for drizzling, thinner for a glaze that will soak into the muffins.
¼ cup powdered sugar, 1½-2½ tablespoon calamansi juice
Once the muffins are cool, drizzle or brush the glaze over the tops.
Notes
For the perfect muffin peak, preheat your oven to 400°F (205°C) for the initial 5 minutes of baking. This jumpstart creates a quick rise for those impressive domes!
Don’t overmix or you’ll get tougher muffins. Lumpy batter is normal.
If using Calamansi juice concentrate- dilute per label to make ⅓ cup juice (or start with a little concentrate + water and taste).
No calamansi? Use 2 tablespoons lime juice + 2 tablespoons orange juice (then add more to reach ⅓ cup).
Storage: airtight container 2 days room temp, 5 days fridge, or freeze 1 month.