Easy Sour Cream Cake with Vanilla Frosting - Recipes by Clare

Ingredients

• 1 1/2 cups plain flour.
• 2 teaspoons baking powder.
• 3/4 cup caster sugar.
• 1/4 teaspoon salt.
• 1/2 cup vegetable oil.
• 2 teaspoons vanilla extract.
• 1 large egg.
• 1 cup sour cream.
• 1/2 cup butter, room temperature.
• 3 cups powdered sugar.
• 1/4 cup sour cream for frosting.