Perfectly soft and moist vanilla cupcakes topped with a rich, fluffy vanilla buttercream. A classic treat for any occasion!
Ensure all cold ingredients (butter, eggs, sour cream, buttermilk) are at room temperature for best results.
Do not overmix the cupcake batter once the flour is added; mix only until just combined.
Measure flour by spooning it into the measuring cup and leveling it off, rather than scooping directly.
Always allow cupcakes to cool completely before frosting to prevent the buttercream from melting.
Adjust powdered sugar and whipping cream in the buttercream to achieve your preferred consistency and sweetness.