Place all ingredients in a food processor or high speed blender and pulse or blend until very smooth and the mixture comes together in a big lump. Press mixture out into an 8x8" pan lined with parchment. I use a mini-roller to get it extra smooth, but hands and fingers work just fine. Refrigerate 15-30 minutes to firm up a bit, then slice into squares or rectangles to serve. Bars will keep in an airtight container in the refrigerator for 1 week or 1 month in the freezer.