Chef John's Sweet Potato Biscuits

Ingredients (11)

• + 1 large orange-fleshed sweet potato, peeled add to pantry
• + 1 teaspoon salt add to pantry
• + 1 tablespoon brown sugar add to pantry
• + ½ cup buttermilk add to pantry
• ✓ 3 ¼ cups self-rising flour
• + 1 ½ sticks unsalted butter, frozen add to pantry
• + 1 tablespoon melted butter add to pantry
• ✓ 4 tablespoons butter, room temperature
• + 1 teaspoon pomegranate molasses add to pantry
• + 1 teaspoon pomegranate juice add to pantry
• + Fresh pomegranate seeds for garnish add to pantry