- 2 cups (250 g/1/2 lb) flour
- 3/4 cup (100 g/3 1/4 oz) cocoa
- 1 1/4 teaspoons baking soda
- 1/2 teaspoon salt
- 3/4 cup (175 g/6 oz) butter
- 1 3/4 cup (350 g/15 oz) sugar
- 2 eggs
- 1 teaspoon vanilla
- 1 1/4 cups (300 ml/1/2 pt) well-rounded red wine
- confectioners' sugar (for sprinkling)
- 1/2 cup (125 g/4 oz) Concord grape jelly
- 2 to 3 tablespoons red wine
- two 9-inch (22 cm) cake pans
- Heat the oven to 350°F (175°C/Gas 4). Butter the cake pans, line each pan with a round of parchment paper, and brush again with butter. Sprinkle the pans with flour, discarding the excess. Sift flour with the cocoa, baking soda, and salt into a bowl.
- Cream the butter in an electric mixer, beat in the sugar, and continue beating until the mixture is light and fluffy, 3 to 5 minutes. Add the eggs, one by one, and then the vanilla, and continue beating 1 to 2 minutes. Sift a third of the flour over the butter mixture and fold them together, using a spoon. Fold in a third of the wine. Add the remaining flour and wine alternately in two batches.
- Spread batter in the prepared pans and bake in the oven until the cakes start to shrink from the sides of the pan, 30 to 35 minutes; a metal skewer inserted in the center should come out clean. Let the cakes cool 10 minutes in the pans, then turn them out on a rack to cool completely.
- Meanwhile make the wine jelly: Melt the jelly with the wine over low heat, stirring gently until combined. Let it cool.
- Shortly before serving, sandwich the cake with the cooled jelly. Sprinkle the top with confectioners' sugar and transfer the cake to a plate to serve.