1. В В Adjust an oven rack to the middle position and preheat the oven to 375°F.

Grease eight six-ounce ramekins with coconut oil and place on a rimmed baking sheet. 2. В В Process the palm sugar, ¼ cup of the walnuts, coconut oil, and salt together in a food processor until finely ground (10 to 15 seconds). With the processor running, add the cream, eggs, and vanilla through the feed tube and continue to process until smooth (about 5 seconds).

Add the flour and baking powder and pulse until just incorporated (about 5 pulses). 3. В В Transfer the batter to a large bowl and gently fold in the blackberries. Spoon the batter into the prepared ramekins and sprinkle with the remaining ¼ cup walnuts. 4. В В Bake the buckles until they are golden and begin to pull away from the sides of the ramekins (25 to 30 minutes), rotating the baking sheet halfway through baking.

Let cool on a wire rack for 10 minutes before serving.