Place pitted dates in a bowl and cover with boiling water; soak for 10 minutes to soften, then drain thoroughly.

Transfer the softened dates to a high-speed food processor.

Add the almond butter, vanilla extract, and sea salt to the food processor.

Process on high speed for 2 to 3 minutes, scraping down the sides occasionally, until the mixture is completely smooth and glossy.

Line a small airtight container with parchment paper and spread the date mixture evenly to a 1/2-inch thickness.

Freeze for at least 1 hour to allow the mixture to firm up before slicing into 12 squares.