Ingredients
Method
Preparing the Cupcakes
- Preheat your oven to 350°F (175°C) and prepare a cupcake pan with cupcake liners.
- In a bowl, mix together the flour, cornstarch, baking powder, and salt. Set aside.
- In a large bowl, cream the softened butter and sugar until light and fluffy.
- Add the lemon zest, egg whites, and vanilla extract, mixing well after each addition.
- Gradually mix in the flour mixture, alternating with the sour cream and lemon juice until just combined.
- Fill the cupcake liners about 2/3 full with the batter.
- Bake for 18-20 minutes or until a toothpick comes out clean. Allow cupcakes to cool completely.
Strawberry Puree
- Blend the fresh strawberries in a blender or food processor until smooth. You can strain it for a smoother texture if you like.
Preparing the Frosting
- In a large bowl, beat the softened butter until creamy.
- Gradually add the sifted powdered sugar, mixing well.
- Once combined, add the strawberry puree and mix until well combined.
- If the frosting is too thick, add heavy whipping cream to reach your desired consistency.
Notes
Store the cupcakes in an airtight container in the refrigerator for up to 4 days. For freezing, wrap each cupcake tightly in plastic wrap and place them in a freezer-safe container.
