This frosting has the goodness of cinnamon and vanilla throughout. Cinnamon buttercream is perfect for apple, pumpkin, banana and spice cakes and cupcakes.
In a large bowl, beat the softened 1 cup butter until completely smooth.
Add 2 cups of powdered sugar and beat for 1-2 more minutes.
Add 2 Tablespoons of milk, the 2 teaspoons ground cinnamon and 1 teaspoon vanilla extract and beat well to incorporate. Add additional powdered sugar or milk, until you reach your taste and texture preferences.
Scoop the frosting into a piping bag fitted with a large star tip.
Swirl a circle of the frosting onto the top of each cooled cupcake. Spoon a teaspoon or two of apple pie filling into the center of the frosting.