CUPCAKES:
3/4 cup melted butter (salted)
3 whole eggs
1 1/3 cup fresh milk
1 teaspoon white vinegar
1 teaspoon vanilla extract
1 cup white sugar
2 cups all-purpose flour
1 teaspoon baking powder
1 teaspoon baking soda
BUTTERCREAM:
1 cup butter (salted)
1 cup all-purpose cream / thickened cream/ heavy cream
1 cup powdered sugar