Preheat the oven to 350ºF.
Line an 8×8 inch baking pan with parchment paper. Set aside.
In a large bowl, cream together the butter and sugar until fully combined. Add in the eggs and vanilla until fully incorporated.
Mix in the flour until just combined. Fold in the dried blueberries, cranberries and white chocolate chips.
Pour the batter into the prepared baking pan, and bake for 35-40 minutes.
Remove from oven, and allow to cool completely.