- Heat oven to 350°F. Prepare muffins tins. (This recipe yielded 15 muffins for me.) 
- In a medium bowl, whisk together flour, baking powder, and salt; set aside. 
- In stand mixer with paddle attachment, cream together room temperature butter and sugar on medium high until light and fluffy. Reduce speed to low and add in eggs, one at a time and mix until just blended. 
- Add in vanilla, 1 tablespoon of orange juice and milk and mix for about 30 seconds on low. Slowly add in dry ingredients and mix until just combined. 
- Remove from mixer then fold in orange zest with spatula. 
- Divide batter evenly among prepared muffin cups. Transfer muffin tin to oven and bake until tops are just dry to the touch, 16 to 20 minutes. 
- Transfer muffin tin to a wire rack. 
- Use pastry brush to brush remaining orange juice over the top of the cupcake. 
- Let cupcakes cool completely and dry before topping with Whipped Vanilla frosting.