Ingredients
Equipment
Method
Step-by-Step Instructions
- Preheat your oven to 325°F (163°C) and line a muffin tin with cupcake liners.
- In a medium bowl, whisk together cake flour, baking powder, baking soda, and salt.
- In another bowl, mix together whole milk, sour cream, and vanilla extract until smooth.
- Beat together unsalted butter and granulated sugar until light and fluffy.
- Add egg whites gradually with the mixer running on low until just incorporated.
- Gradually add the dry mixture to the creamed butter, alternating with the wet mixture until combined.
- Fill each cupcake liner about ¾ full with batter.
- Bake for 20-22 minutes until tops spring back lightly. Cool for 5 minutes.
- Beat butter and powdered sugar until crumbly, then add milk and vanilla to make frosting.
- Adjust frosting consistency with milk if needed, then frost cooled cupcakes.
Nutrition
Notes
Use room temperature ingredients for best results. Sift cake flour for lightness and avoid overmixing.
