Place all ingredients except for the half and half into a large food processor. Blend for 1 minute, stopping every 15 seconds or so to scrape the sides.
Add the half and half and continue blending for 1-2 minutes, stopping every 15 seconds or so to scrape the sides. You want the mixture to be smooth. If needed, add more half and half. Ours comes out perfect without it and it matches the consistency of the real spread.
Blend for 1 minute. Take the lid off and use a spatula to scrape down the sides.
Transfer spread to a bowl. Cover and refrigerate for 1 hour to overnight.