Chocolate-Raspberry Soufflé

Position rack in center of oven; preheat to 375°F. Toast pistachios on a rimmed baking sheet, tossing once, until fragrant and slightly darkened, 5–6 minutes. Let cool slightly, then coarsely chop.

Meanwhile, butter ramekins, making upward strokes up the sides with a pastry brush. Sprinkle with sugar, tilting to coat completely and tapping out any excess. Arrange prepared ramekins on baking sheet.

Combine chocolate and jam in a medium heatproof bowl set over a saucepan of barely simmering water (do not let bowl touch water); stir constantly until chocolate is melted and mixture is smooth, 1–2 minutes. Remove bowl from heat. Stir in egg yolk and 1/4 tsp. salt.