Bake cake until top is gently set, about 20 minutes. Reduce oven temperature to 375°F. Dot top of cake with 2 tablespoons butter and sprinkle with 2 tablespoons sugar. Continue baking until tester inserted into center of cake comes out clean, about 15 minutes. Cool in pan on rack. Release pan sides; transfer cake to platter. Cool to room temperature.
03Mix crème fraîche and 2 tablespoons sugar in small bowl. (Cake and crème fraîche mixture can be made 8 hours ahead. Let cake stand at room temperature. Cover and chill crème fraîche mixture.) Cut cake into wedges. Top each with dollop of crème fraîche and fresh raspberries and serve.