Preheat oven to 450 degrees Fahrenheit. Spray a cupcake or popover pan with cooking spray; set aside.
In the bowl of a stand mixer, beat eggs until pale and foamy.
In a small saucepan over medium heat, warm milk to about 110 degrees (I like to call this “bathtub warm.”) Once milk is at the desired temperature, remove from heat and add to eggs in stand mixer. Add sugar and beat to combine.
In a separate medium bowl, sift together the flour, baking powder and salt. Add these dry ingredients to the wet ingredients. Beat until all ingredients are combined.
Add passion fruit butter and orange zest. Beat on low until incorporated.