Preheat the oven to 425°F. Line a muffin pan with 8 muffin liners. Spray the top of the pan if you have nonstick spray to ensure the tops don't stick to the pan.
Whisk together the all purpose flour, salt, and baking powder.
Using a microplane, zest the oranges. Whisk the orange zest and sugar together until it resembles wet sand, you want to release the oils. You can also use your fingers to rub the sugar and zest together. Add the melted butter, milk, vanilla, and eggs. Whisk until fully combined.
Add in the dry ingredients, mix until combined, add the chocolate chips and fold until incorporated, do not over mix. The batter will be thick
Divide the batter between the 8 muffin cups, it will look like a lot of batter for one cup, it’s not. Top with a little more sugar (I like turbinado raw sugar) to just coat the top
Place in the oven and immediately reduce the temperature down to 400°F. Bake until toothpick comes out clean, about 20-24 minutes, check earlier if your oven runs hot.