Scoop the thick coconut cream from the chilled cans into a large cold bowl, leaving the watery liquid behind. Beat for 2-3 minutes until smooth and fluffy.
Whisk the sweetened condensed coconut milk with 1/3 cup cookie butter, the vanilla and salt until smooth, then fold it into the whipped coconut cream.
Fold in most of the crushed speculoos cookies, reserving some for the top.
Warm the remaining 1/2 cup cookie butter in the microwave for about 20 seconds until pourable.
Layer half the base in a 9x5 inch loaf pan, drizzle with half the warm cookie butter and swirl gently, then repeat with the remaining base and cookie butter. Top with the reserved cookie crumbs.
Cover and freeze for at least 6 hours, then let sit at room temperature for 10 minutes before scooping.