Vanilla Cupcakes with Fruity Pebbles Buttercream Frosting Recipe | Say Mmm

Ingredients

• 1 1/2 cups all-purpose flour
• 1 cup granulated sugar
• 1 1/2 teaspoons baking powder
• 1/2 teaspoon fine grain salt
• 8 tablespoons unsalted butter (1 stick), room temperature
• 1/2 cup sour cream
• 1 large egg , room temperature
• 2 large egg yolks , room temperature
• 1 1/2 teaspoons vanilla extract
• 1 cup finely crushed / powdered Fruity Pebbles (measured after crushing)
• 3/4 cup butter, room temperature
• 1/4 cup vegetable shortening
• 2 cups powdered sugar
• 2 Tablespoons heavy cream
• 1 teaspoon vanilla