Using an electric stand mixer (or you can just stir by hand in a mixing bowl), cream together Biscoff spread and sugar on medium speed until combined. Stir in salt and vanilla. Then on low speed, gradually add in half and half and heavy cream until the mixture is combined and smooth.

Pour mixture into an ice cream maker and process until thick, about 30 minutes or according to manufacturer’s directions. Transfer ice cream to a freezer-safe container, cover and freeze until ready to serve.