Preheat oven to 375°F. Line a 9-inch square baking dish with parchment paper. Set aside.
In a large microwave safe bowl, combine butter and white chocolate chips. Heat for one minute on high. Stir until well blended (it's okay if there are a few bits of white chocolate).
Add in sugar, flour, eggs, and salt. Stir just until combined (do not over stir). Fold in 3/4 cup white chocolate chips.
Pour into prepared baking dish. Bake for 30-34 minutes, top will be lightly browned. Allow to cool. Cut into squares and enjoy.
Video
Notes
Store in airtight container for up to one week.
These are great refrigerated too! Store in refrigerator for a delicious chilled treat.