When using them in the freezer, do not fill them to the top. (verywellfamily.com)
Remove the tart shell from the refrigerator and line the crust with parchment paper and then fill it to the top with either pie weights, beans or dried lentils. (theharvestkitchen.com)
Pour the coconut butter into the molds, not quite filling them to the top as the coconut butter will expand slightly when set. (cnz.to)