3 tablespoons confectioners' sugar plus more for garnish
2 tablespoons rum dark
6 large eggs separated
1 teaspoon gelatin powder unflavored
0.3 cup granulated sugar
0.8 teaspoon ground allspice
1.5 teaspoons ground cinnamon
1.3 teaspoons ground ginger
1 cup heavy cream chilled
0.3 cup brown sugar light packed
0.1 teaspoon salt
1 cup tablespoons toffee pieces english plus more for garnish
Equipment
bowl
baking sheet
baking paper
oven
kitchen towels
spatula
serrated knife
Directions
For the cake: Preheat the oven to 375 degrees F.
Line a 15 by 10 by 1-inch baking sheet with parchment paper. Spray the parchment with nonstick cooking spray.
Sift the flour, cinnamon, ginger, and allspice into a small bowl. In a separate bowl, beat the egg yolks, granulated sugar, and brown sugar until very thick.
Add the pumpkin to the egg mixture and combine at a low speed until incorporated.
Add the dry ingredients and beat at a low speed until mixed. In a separate bowl, beat the egg whites and salt until stiff but not dry. Fold into the cake batter, stirring with a spatula, until most of the white streaks are gone.
Spread the batter onto a baking sheet and smooth out.
Transfer baking sheet to the oven and bake until a tester comes out clean, about 15 to 18 minutes. While the cake is hot, dust generously with powdered sugar. Loosen the edges and turn the cake out onto a kitchen towel. Fold the towel over the edge of the cake and roll up. Cool completely, edge down, for 1 hour in the refrigerator.
For the filling: Soften the gelatin in the rum. Stir over low heat until the gelatin dissolves. Cool. Beat the chilled whipping cream and powdered sugar in a large bowl until peaks form. Fold in the gelatin and 6 tablespoons English toffee pieces.
To assemble, unroll the cake and sprinkle with 4 tablespoons of English toffee pieces.
Spread the filling over the toffee. Start at 1 long side of the cake roll and, using the towel as an aid, roll up the cake to encase the filling.
Place the cake, seam-side down, on a platter.
Trim the ends of the cake at a slight diagonal. Dust the cake with powdered sugar. Spoon some warm caramel sauce and the remaining toffee chips over the top of the cake. To serve, use a serrated knife to cut the cake crosswise into 1-inch thick slices.