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Ingredients

CAKE

1. Fine dry bread crumbs, for dusting
2. 2 cups walnut halves (about 7 ounces)
3. 1/4 cup unsweetened cocoa powder (not Dutch process)
4. 1/2 cup cake flour
5. 1 teaspoon instant espresso powder
6. 8 large eggs, separated
7. 1 cup sugar
8. 2 teaspoons pure vanilla extract
9. 1/4 teaspoon salt

FILLING

1. 6 large egg yolks
2. 1/2 cup sugar
3. Pinch of salt
4. 2 tablespoons instant espresso powder dissolved in 1/2 cup hot water
5. 1 pound unsalted butter, softened
6. 3 tablespoons coffee liqueur
7. 1 tablespoon pure vanilla extract
8. 1/2 cup dark rum, for brushing
9. 1 1/2 cups finely chopped walnuts (about 5 ounces), plus walnut halves for garnish

Description

5

Food & Wine