Preheat the oven to 350 degrees. Line a muffin tin with cupcake liners.

In a medium bowl combine the flour, baking power, and salt. Mix well.

In a large bowl combine the butter and sugar and mix well. Add in the eggs and stir to combine. Beat in the vanilla.

Add half the flour mixture to the butter mixture and mix until combined. Add the milk and stir until blended. Add the remaining flour mixture and mix until just combined.

Fold in the cranberries and white chocolate chips.

Divide the batter between the muffin cups filling each one about 3/4 of the way full.

Bake for 20-25 minutes or until a toothpick inserted into the center comes out clean.

Remove from the oven and cool completely on a wire rack.

To make the frosting beat the butter in a large bowl until smooth. Add in the powdered sugar a half cup at a time until the frosting is fluffy and smooth.

Add the milk and vanilla and beat until combined.

Pipe the frosting onto the cupcakes and decorate with sprinkles, candies, or dried cranberries.