Preheat the oven to 350 degrees F.
In a large bowl, cream butter and sugar until fluffy. Mix in vanilla. Add the flour to wet mixture and mix just until combined.
Spread on a greased, foil lined baking sheet (I use a 11 x 7 x 1.5 inch pan/cookie sheet).
* The dough will be just like cookie dough - heavy and sticky- so it's best to spray your hands with a little nonstick spray and use them to help mold the dough into the pan.
Bake for 25-30 minutes, or until the edges are slightly golden brown.
Remove the pan from the oven and let the bars cool completely.
Beat the cream cheese on medium speed until smooth, then fold in the melted white chocolate and mix on medium speed until smooth and incorporated evenly.
Spread cream cheese mixture over cooled sugar cookie bars.
Place in the fridge for about 30 minutes to let the cream layer set up.
* I learned that these look the best if you put the berries on right before serving, otherwise the juice from the berries can tint your cream layer pink.
Decorate with fresh berries, cut into squares, and serve.
* You can use a spoon to drizzle white chocolate over the tops of the berries if you like.
* Store the bars in an airtight container in the refrigerator for up to 2 days.