01 -
Set your oven to 350°F and get a muffin tin lined with cupcake wrappers.
02 -
Stir together the flour, sugar, baking powder, baking soda, and salt in a bowl.
03 -
Beat your softened butter and sugar until fluffy. Beat in eggs one at a time, then stir in the orange juice and zest.
04 -
Add dry ingredients to the wet mix alternately with buttermilk, stirring slightly each time.
05 -
Spoon batter into liners, filling each about ¾ full. Bake for 18-20 minutes and cool on a rack.
06 -
Beat butter until creamy, then slowly mix in powdered sugar, cocoa powder, milk, and vanilla. Spread or pipe onto the cooled treats.