1. Massage the zest and sugar—As you begin making your muffins, use the tips of your fingers to massage the zest into the sugar. After a few minutes of massaging, the sugar should resemble wet sand, and you should be able to smell a citrus aroma.
2. Add the orange juice and melted butter—Instead of creaming, melt the butter in a saucepan or double boiler and then add it with the sugar. Squeeze an orange for three tablespoons of juice. It’s best to add the orange juice to the sugar and orange zest later when combining other ingredients to avoid the mixture from separating and curdling.
3. Allow the mixture to cool before combining it with beaten eggs – After adding the orange juice and melted butter, let the mixture cool before beating the eggs with an electric hand mixer or a whisk until light and fluffy.
4. Gently fold in sifted dry ingredients – Finally, gently fold in the sifted dry ingredients, often alternating with liquid ingredients like milk or buttermilk. The goal is to mix just enough to incorporate the ingredients while maintaining the airiness of the batter. Be careful not to mix over, as this could result in a tough muffin.
5. Rest the batter – Rest the muffin batter at room temperature for about an hour and cover it with a lid or a clean kitchen towel. This will allow the flavors of the liquids to develop further and give the flour time to absorb moisture evenly.
6. Divide the batter – Use a large cookie scoop to evenly distribute the batter between the lined/greased muffin cavities.
7. Bake and check for doneness – Bake the muffins at 400°F for 18 minutes. Test for doneness by inserting a toothpick or a cake tester into the center of the muffins. It should come out clean with no loose crumbs attached.
8. Allow the muffins to cool—Once the muffins are done baking, allow them to cool inside the muffin tray for 2 to 3 minutes before using a knife to remove them and transfer them to a wire rack to continue cooling for at least 30 minutes before adding the glaze.